Material Phase B Stufe 4: PBR auf Rhino-Material applied + Auto-Regen

_ensure_pbr_material baut ein vollständiges Rhino-Material aus dem
Project-Settings-dict:
- ToPhysicallyBased() + BaseColor/Roughness/Metallic/Opacity/OpacityIor
- Diffuse-/Bump-/Transparency-Texture via SetBitmapTexture etc.
- UV-Repeat = 1/uvScaleM
- Cache per Signature (Color+PBR+Texture-Pfade)

_get_all_materials liefert jetzt full-dicts (nicht mehr nur color/hatch/
scale) damit Wand-Regen Zugriff auf PBR + Texturen hat.

Wand-Regen: wenn voll-dict aus Project-Settings vorliegt → PBR-Material,
sonst Fallback auf legacy _ensure_material(hex).

Auto-Regen on Save:
- PBR-Material-Cache + Legacy-Material-Cache invalidieren
- Alle wand_axis im Doc regenerieren (in EINEM Undo-Record)
- User aendert Material-Properties -> existierende Waende updaten sofort

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

rhino/elemente.py

@@ -2208,10 +2208,19 @@ _MATERIAL_LIBRARY = {
 
 def _get_all_materials(doc):
     """Builtin _MATERIAL_LIBRARY + Projekt-Settings-Materialien gemerged.
-    Returns dict[name] -> {color, hatch, scale}. Projekt-Settings (inkl.
-    Library-Imports) ueberschreibt builtin bei Namensgleichheit, sodass
-    der User builtin-Defaults pro Projekt anpassen kann."""
-    merged = {n: dict(m) for n, m in _MATERIAL_LIBRARY.items()}
+    Returns dict[name] -> full material dict (color/hatch/scale + PBR +
+    textures + uvScaleM). Projekt-Settings ueberschreibt builtin bei
+    Namensgleichheit. Builtin-Materialien bekommen leere PBR-Defaults."""
+    merged = {}
+    for n, m in _MATERIAL_LIBRARY.items():
+        merged[n] = dict(m)
+        # Builtin: PBR-Defaults wenn nicht gesetzt
+        merged[n].setdefault("roughness", 0.7)
+        merged[n].setdefault("reflection", 0.1)
+        merged[n].setdefault("transparency", 0.0)
+        merged[n].setdefault("iorN", 1.0)
+        merged[n].setdefault("uvScaleM", 1.0)
+        merged[n].setdefault("textures", {})
     try:
         import rhinopanel
         ps = rhinopanel.load_project_settings(doc) if doc else None
@@ -2219,11 +2228,9 @@ def _get_all_materials(doc):
             for m in ps.get("materials", []):
                 n = m.get("name")
                 if not n: continue
-                merged[n] = {
-                    "color": m.get("color", "#888888"),
-                    "hatch": m.get("hatch", "Solid"),
-                    "scale": float(m.get("scale", 1.0) or 1.0),
-                }
+                # Komplettes dict uebernehmen — _normalize_material hat
+                # bereits alle Felder validiert.
+                merged[n] = dict(m)
     except Exception as ex:
         print("[ELEMENTE] _get_all_materials:", ex)
     return merged
@@ -2330,6 +2337,126 @@ def _ensure_material(doc, hex_color):
         return -1
 
 
+def _ensure_pbr_material(doc, mat_dict):
+    """Erstellt oder findet ein Rhino-PBR-Material aus dem Project-Settings-
+    dict (color + roughness + reflection + transparency + iorN + textures +
+    uvScaleM). Cached pro signature in sc.sticky. Liefert Material-Index
+    oder -1.
+    Setzt:
+    - PhysicallyBased.BaseColor (aus color)
+    - PhysicallyBased.Roughness, Opacity (= 1-transparency), OpacityIor
+    - PhysicallyBased.Metallic = reflection (Naeherung)
+    - SetBitmapTexture / SetBumpTexture / SetTransparencyTexture wenn
+      Pfade gesetzt
+    - Texture.Repeat = (1/uvScaleM, 1/uvScaleM)"""
+    if not isinstance(mat_dict, dict): return -1
+    color = mat_dict.get("color") or "#888888"
+    if not isinstance(color, str) or not color.startswith("#") or len(color) < 7:
+        return -1
+    # Cache-Key: alle PBR-Felder + Texture-Pfade
+    texs = mat_dict.get("textures") or {}
+    def _p(slot):
+        t = texs.get(slot) if isinstance(texs, dict) else None
+        return (t or {}).get("path", "") if isinstance(t, dict) else ""
+    sig = "|".join([
+        color.lower(),
+        "r{:.3f}".format(float(mat_dict.get("roughness", 0.7))),
+        "x{:.3f}".format(float(mat_dict.get("reflection", 0.1))),
+        "t{:.3f}".format(float(mat_dict.get("transparency", 0.0))),
+        "i{:.3f}".format(float(mat_dict.get("iorN", 1.0))),
+        "u{:.3f}".format(float(mat_dict.get("uvScaleM", 1.0))),
+        "d=" + _p("diffuse"),
+        "b=" + _p("bump"),
+        "g=" + _p("roughness"),
+        "p=" + _p("transparency"),
+    ])
+    cache = sc.sticky.get("_dossier_pbr_material_cache")
+    if not isinstance(cache, dict):
+        cache = {}
+        sc.sticky["_dossier_pbr_material_cache"] = cache
+    cached = cache.get(sig)
+    if cached is not None:
+        try:
+            if 0 <= cached < doc.Materials.Count:
+                m = doc.Materials[cached]
+                if m is not None and not m.IsDeleted:
+                    return cached
+        except Exception: pass
+        del cache[sig]
+    # Material bauen
+    try:
+        import System.Drawing as SD
+        h = color.lstrip("#")
+        r = int(h[0:2], 16); g = int(h[2:4], 16); b = int(h[4:6], 16)
+        mat = Rhino.DocObjects.Material()
+        mat.Name = "Dossier_PBR_" + (mat_dict.get("name") or "Mat")[:20]
+        mat.DiffuseColor = SD.Color.FromArgb(255, r, g, b)
+        # PBR-Properties
+        try:
+            mat.ToPhysicallyBased()
+            pbr = mat.PhysicallyBased
+            if pbr is not None:
+                # Color4f (linear) — RGB normalisieren
+                try:
+                    from Rhino.Display import Color4f
+                    pbr.BaseColor = Color4f(r/255.0, g/255.0, b/255.0, 1.0)
+                except Exception: pass
+                try: pbr.Roughness = float(mat_dict.get("roughness", 0.7))
+                except Exception: pass
+                # reflection ~ metallic (Naeherung — bei nicht-Metallen
+                # bleibt Roughness/IoR das Hauptmerkmal). User kann das
+                # spaeter via separates Metallic-Feld feiner steuern.
+                try: pbr.Metallic = float(mat_dict.get("reflection", 0.0))
+                except Exception: pass
+                trans = float(mat_dict.get("transparency", 0.0))
+                try: pbr.Opacity = max(0.0, 1.0 - trans)
+                except Exception: pass
+                try: pbr.OpacityIor = float(mat_dict.get("iorN", 1.0))
+                except Exception: pass
+        except Exception as ex:
+            print("[ELEMENTE] PBR setup:", ex)
+        # Texturen + UV-Repeat
+        try:
+            uv = float(mat_dict.get("uvScaleM", 1.0)) or 1.0
+            uv_repeat = 1.0 / uv  # uvScaleM = 1m → 1x; 0.5m → 2x Repeat
+        except Exception: uv_repeat = 1.0
+        def _apply_tex(slot, setter_name):
+            p = _p(slot)
+            if not p: return
+            try:
+                setter = getattr(mat, setter_name, None)
+                if setter is None: return
+                ok = setter(p)
+                if not ok: return
+                # Repeat auf den frisch gesetzten Texture-Slot — alle
+                # Slot-Indices durchgehen und matchen.
+                try:
+                    import Rhino.Geometry as rgg
+                    for i in range(mat.GetTextures().Count if False else 100):
+                        try: t = mat.GetTexture(i)
+                        except Exception: break
+                        if t is None: continue
+                        try: t.Repeat = rgg.Vector2d(uv_repeat, uv_repeat)
+                        except Exception: pass
+                        try: mat.SetTexture(t, t.TextureType)
+                        except Exception: pass
+                except Exception: pass
+            except Exception as ex:
+                print("[ELEMENTE] apply tex {}:".format(slot), ex)
+        _apply_tex("diffuse",      "SetBitmapTexture")
+        _apply_tex("bump",         "SetBumpTexture")
+        _apply_tex("transparency", "SetTransparencyTexture")
+        # Roughness-Texture: kein direkter Setter im Legacy-Material —
+        # PhysicallyBased haette eine, ueberspringen wir hier (Phase B+)
+        idx = doc.Materials.Add(mat)
+        if idx >= 0:
+            cache[sig] = idx
+        return idx
+    except Exception as ex:
+        print("[ELEMENTE] _ensure_pbr_material:", ex)
+        return -1
+
+
 def _make_wand_layer_breps(axis_curve, layers, dicke, referenz, uk, ok,
                              miter_start=None, miter_end=None):
     """Baut eine Liste (brep, color_hex, name) pro Schicht. Schicht-Reihen-
@@ -5451,8 +5578,10 @@ def _regenerate_element_body(doc, element_id, src_obj, meta, geom, geschoss_name
             effective_color = color
             target_layer = layer
             all_mats = _get_all_materials(doc)
+            full_mat_dict = None  # PBR + Texturen wenn aus Project-Settings
             if mat_name and mat_name in all_mats:
-                effective_color = all_mats[mat_name]["color"]
+                full_mat_dict = all_mats[mat_name]
+                effective_color = full_mat_dict.get("color", color)
                 target_layer = _ensure_material_sublayer(doc, geschoss_name,
                                                           mat_name)
                 if target_layer < 0: target_layer = layer
@@ -5467,13 +5596,17 @@ def _regenerate_element_body(doc, element_id, src_obj, meta, geom, geschoss_name
                     Rhino.DocObjects.ObjectColorSource.ColorFromObject)
                 attrs.ObjectColor = SD.Color.FromArgb(255, 0, 0, 0)
             except Exception: pass
-            # Faces via Material (DiffuseColor) — getrennt vom ObjectColor.
-            if effective_color:
+            # Faces via Material — wenn voll-dict mit PBR vorhanden, PBR-
+            # Material mit Texturen bauen, sonst einfaches Diffuse-Material.
+            mat_idx = -1
+            if full_mat_dict is not None:
+                mat_idx = _ensure_pbr_material(doc, full_mat_dict)
+            if mat_idx < 0 and effective_color:
                 mat_idx = _ensure_material(doc, effective_color)
-                if mat_idx >= 0:
-                    attrs.MaterialIndex = mat_idx
-                    attrs.MaterialSource = (
-                        Rhino.DocObjects.ObjectMaterialSource.MaterialFromObject)
+            if mat_idx >= 0:
+                attrs.MaterialIndex = mat_idx
+                attrs.MaterialSource = (
+                    Rhino.DocObjects.ObjectMaterialSource.MaterialFromObject)
             _attach_meta(attrs, element_id, "wand_volume",
                          meta["geschoss"], meta["dicke"],
                          meta["uk_override"], meta["ok_override"],

rhino/rhinopanel.py

@@ -141,21 +141,62 @@ _PROJECT_SETTINGS_DEFAULTS = {
 
 
 def _normalize_material(m):
-    """Garantiert Material-Schema: name + color + hatch + scale + source
-    + libraryId. source: 'local' | 'library' | 'builtin'. libraryId: UUID
-    wenn aus Library, sonst null. Felder fehlen bei alten Eintraegen — wir
-    setzen Defaults damit Frontend nicht null-checken muss."""
+    """Garantiert Material-Schema. Felder:
+    - Identitaet: name, source ('local'|'library'|'builtin'), libraryId
+    - Section-Hatch (2D): color, hatch, scale
+    - PBR (3D-Render): roughness (0..1), reflection (0..1),
+      transparency (0..1), iorN (1.0..2.5)
+    - UV: uvScaleM (= 1 Welt-Meter ≙ wieviel der Textur)
+    - Texturen: textures = { diffuse, bump, roughness, transparency }
+      pro Slot {path: absolute string} oder null. Strength fuer Bump."""
     if not isinstance(m, dict): return None
+    textures = m.get("textures") or {}
+    if not isinstance(textures, dict): textures = {}
+    def _tex(slot):
+        t = textures.get(slot)
+        if not isinstance(t, dict): return None
+        p = t.get("path")
+        if not p: return None
+        out = {"path": str(p)}
+        # Bump hat zusaetzlich strength (-1..1, default 0.5)
+        if slot == "bump":
+            try: out["strength"] = float(t.get("strength", 0.5))
+            except Exception: out["strength"] = 0.5
+        return out
     return {
         "name":      m.get("name") or "Unbenannt",
         "color":     m.get("color") or "#888888",
         "hatch":     m.get("hatch") or "Solid",
         "scale":     float(m.get("scale", 1.0) or 1.0),
         "source":    m.get("source") or "local",
-        "libraryId": m.get("libraryId"),  # None wenn nicht aus Library
+        "libraryId": m.get("libraryId"),
+        # PBR (3D-Render) — alle 0..1 ausser iorN
+        "roughness":    _clamp01(m.get("roughness", 0.7)),
+        "reflection":   _clamp01(m.get("reflection", 0.1)),
+        "transparency": _clamp01(m.get("transparency", 0.0)),
+        "iorN":         _clamp(m.get("iorN", 1.0), 1.0, 2.5),
+        # UV-Skalierung (1 m = uvScaleM Textur-Tiles)
+        "uvScaleM":     float(m.get("uvScaleM", 1.0) or 1.0),
+        # Texturen
+        "textures": {
+            "diffuse":      _tex("diffuse"),
+            "bump":         _tex("bump"),
+            "roughness":    _tex("roughness"),
+            "transparency": _tex("transparency"),
+        },
     }
 
 
+def _clamp01(v):
+    try: return max(0.0, min(1.0, float(v)))
+    except Exception: return 0.0
+
+
+def _clamp(v, lo, hi):
+    try: return max(lo, min(hi, float(v)))
+    except Exception: return lo
+
+
 def load_project_settings(doc):
     """Liefert die Project-Settings als dict — mit Defaults-Merge wenn
     Felder fehlen. Garantiert dass `defaults` und `materials` immer da
@@ -617,6 +658,12 @@ class EbenenBridge(panel_base.BaseBridge):
             try: self._open_library()
             except Exception as ex:
                 print("[EBENEN] open library:", ex)
+        elif t == "PICK_TEXTURE_FILE":
+            # Oeffnet macOS-File-Picker fuer Bild-Dateien. Antwort an
+            # Frontend via TEXTURE_PICKED-Message.
+            try: self._pick_texture_file(p)
+            except Exception as ex:
+                print("[EBENEN] pick texture:", ex)
 
     # ---- Helpers ----
 
@@ -659,12 +706,49 @@ class EbenenBridge(panel_base.BaseBridge):
             }
             save_project_settings(doc2, new_settings)
             _broadcast_state(doc2)
+            # Material-Cache invalidieren (PBR-Cache hashed Color+Texturen+
+            # PBR-Werte — wenn der User ein Material aendert, muss der
+            # Cache leer sein, sonst kriegen Waende stale Material-Indizes).
+            try:
+                import scriptcontext as sc
+                sc.sticky["_dossier_pbr_material_cache"] = {}
+                sc.sticky["_dossier_material_cache"] = {}
+            except Exception: pass
             try:
                 import scriptcontext as sc
                 eb = sc.sticky.get("elemente_bridge")
                 if eb is not None: eb._send_state()
             except Exception as ex:
                 print("[PROJECT-SETTINGS] elemente refresh:", ex)
+            # Alle wand_axis im Doc regenen damit Material-Aenderungen
+            # (PBR/Texturen/Hatch) auf existing Waende durchschlagen.
+            try:
+                import elemente
+                undo_serial = doc2.BeginUndoRecord("Material-Update Regen")
+                prev_redraw = doc2.Views.RedrawEnabled
+                doc2.Views.RedrawEnabled = False
+                wall_ids = []
+                for obj in doc2.Objects:
+                    m = elemente._read_meta(obj)
+                    if m and m.get("type") == "wand_axis":
+                        wall_ids.append(m["id"])
+                # Chain-Anchor regent automatisch alle members — wir koennen
+                # trotzdem alle einzeln triggern, _REGEN_BUSY-Guard verhindert
+                # Doppel-Arbeit. Einfacher als Anchor-Election hier.
+                try:
+                    for wid in wall_ids:
+                        try: elemente._regenerate_element(doc2, wid)
+                        except Exception as ex:
+                            print("[PROJECT-SETTINGS] regen", wid, ex)
+                finally:
+                    doc2.Views.RedrawEnabled = prev_redraw
+                    try: doc2.EndUndoRecord(undo_serial)
+                    except Exception: pass
+                try: doc2.Views.Redraw()
+                except Exception: pass
+                print("[PROJECT-SETTINGS] {} Waende regenert".format(len(wall_ids)))
+            except Exception as ex:
+                print("[PROJECT-SETTINGS] wall regen:", ex)
         panel_base.open_satellite_window(
             "project_settings",
             params=params,
@@ -672,6 +756,36 @@ class EbenenBridge(panel_base.BaseBridge):
             size=(440, 540),
             on_save=on_save)
 
+    def _pick_texture_file(self, payload):
+        """Oeffnet macOS-File-Picker (via Eto.Forms.OpenFileDialog) und
+        schickt den ausgewaehlten Pfad zurueck ans Frontend.
+        Payload: {slot: 'diffuse'|'bump'|...} — slot wird mit zurueckgegeben
+        damit das Frontend weiss welches Slot-Field aktualisieren."""
+        slot = payload.get("slot") or "diffuse"
+        try:
+            import Eto.Forms as forms
+            dlg = forms.OpenFileDialog()
+            dlg.Title = "Textur waehlen ({})".format(slot)
+            dlg.MultiSelect = False
+            f = forms.FileFilter("Bilder",
+                ".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp", ".tga")
+            dlg.Filters.Add(f)
+            dlg.Filters.Add(forms.FileFilter("Alle", ".*"))
+            try:
+                parent_form = sc.sticky.get("_dossier_active_settings_form")
+            except Exception:
+                parent_form = None
+            res = (dlg.ShowDialog(parent_form) if parent_form
+                   else dlg.ShowDialog(None))
+            if str(res) != "Ok":
+                self.send("TEXTURE_PICKED", {"slot": slot, "path": None})
+                return
+            path = dlg.FileName or ""
+            self.send("TEXTURE_PICKED", {"slot": slot, "path": path})
+        except Exception as ex:
+            print("[EBENEN] pick texture:", ex)
+            self.send("TEXTURE_PICKED", {"slot": slot, "path": None})
+
     def _open_library(self):
         """Oeffnet den Library-Browser als Satellite. Bridge bleibt offen
         damit User mehrere Items hintereinander importieren kann; nach

src/components/ProjectSettingsDialog.jsx

@@ -1,9 +1,9 @@
-import { useState } from 'react'
+import { useState, useEffect } from 'react'
 import Icon from './Icon'
 import { BarToggle, BarButton, BAR_H } from './BarControls'
-import { openLibrary } from '../lib/rhinoBridge'
+import { openLibrary, pickTextureFile, onMessage } from '../lib/rhinoBridge'
 
-/* Pill-Stil Field — Label klein in Caps, Inhalt darunter, optional Hint */
+/* Field — Stack-Layout fuer komplexe Inputs (mehrere Felder nebeneinander) */
 function Field({ label, hint, children, style }) {
   return (
     <div style={{ display: 'flex', flexDirection: 'column', gap: 4,
@@ -21,6 +21,34 @@ function Field({ label, hint, children, style }) {
   )
 }
 
+/* InlineNumberField — Label links, schmales Number-Input rechts (kompakt) */
+function InlineNumberField({ label, hint, value, onChange, step, min, max, suffix }) {
+  return (
+    <div style={{ padding: '5px 0' }}>
+      <div style={{ display: 'flex', alignItems: 'center', gap: 10 }}>
+        <span style={{ flex: 1, fontSize: 11, color: 'var(--text-primary)',
+                        letterSpacing: '0.01em' }}>{label}</span>
+        <input type="number" value={value ?? ''}
+          step={step} min={min} max={max}
+          onChange={(ev) => onChange(parseFloat(ev.target.value))}
+          style={{ width: 80, height: BAR_H, padding: '0 10px',
+                    fontSize: 11, textAlign: 'right' }} />
+        {suffix && (
+          <span style={{ width: 24, fontSize: 10, color: 'var(--text-muted)' }}>
+            {suffix}
+          </span>
+        )}
+      </div>
+      {hint && (
+        <div style={{ fontSize: 9, color: 'var(--text-muted)',
+                       lineHeight: 1.4, marginTop: 3 }}>
+          {hint}
+        </div>
+      )}
+    </div>
+  )
+}
+
 /* Pill-Tabs — gleicher Stil wie BarToggle aus der Oberleiste */
 function TabBar({ tabs, active, onChange }) {
   return (
@@ -39,70 +67,281 @@ function TabBar({ tabs, active, onChange }) {
   )
 }
 
-function MaterialRow({ mat, hatchPatterns, onChange, onDelete, builtin }) {
-  const isBuiltin = builtin || mat.source === 'builtin'
+/* MaterialListRow — schmale Listen-Zeile links (ArchiCAD-Stil):
+   Color-Swatch + Name + Source-Badge. Click selektiert. */
+function MaterialListRow({ mat, isBuiltin, isSelected, onSelect }) {
   const isLibrary = mat.source === 'library'
   return (
-    <div style={{
-      display: 'grid', gridTemplateColumns: '18px 1fr 92px 56px 22px',
-      alignItems: 'center', gap: 6,
-      padding: '4px 8px',
-      borderRadius: 6,
-      background: isBuiltin ? 'var(--bg-section)' : 'transparent',
-      transition: 'background 0.12s',
-    }}
-    onMouseEnter={(e) => { if (!isBuiltin) e.currentTarget.style.background = 'var(--bg-item-hover)' }}
-    onMouseLeave={(e) => { if (!isBuiltin) e.currentTarget.style.background = 'transparent' }}
-    >
-      <input type="color" value={mat.color || '#888888'}
-        onChange={(ev) => onChange({ ...mat, color: ev.target.value })}
-        title="Farbe"
-        style={{ width: 18, height: 18, padding: 0, border: 'none',
-                  background: 'transparent', cursor: 'pointer' }} />
-      <input type="text" value={mat.name || ''}
-        onChange={(ev) => onChange({ ...mat, name: ev.target.value })}
-        disabled={isBuiltin}
-        placeholder="Name"
-        style={{ minWidth: 0, height: BAR_H, padding: '0 10px',
-                  fontSize: 11,
-                  opacity: isBuiltin ? 0.7 : 1 }} />
-      <select value={mat.hatch || 'Solid'}
-        onChange={(ev) => onChange({ ...mat, hatch: ev.target.value })}
-        style={{ minWidth: 0, height: BAR_H, fontSize: 10 }}>
-        {(hatchPatterns || []).map(h => (
-          <option key={h} value={h}>{h}</option>
-        ))}
-      </select>
-      <input type="number" step="0.1" min="0.1"
-        value={mat.scale ?? 1.0}
-        onChange={(ev) => onChange({ ...mat, scale: parseFloat(ev.target.value) || 1.0 })}
-        title="Hatch-Skalierung"
-        style={{ minWidth: 0, height: BAR_H, padding: '0 10px',
-                  fontSize: 11, textAlign: 'right' }} />
-      {isLibrary ? (
-        <span style={{ fontSize: 9, fontWeight: 600,
-                       color: 'var(--accent)',
-                       display: 'inline-flex', alignItems: 'center',
-                       justifyContent: 'center' }}
-              title="Aus Dossier-Library">L</span>
-      ) : isBuiltin ? (
-        <span style={{ fontSize: 9, fontWeight: 600,
-                       color: 'var(--text-muted)',
-                       display: 'inline-flex', alignItems: 'center',
-                       justifyContent: 'center' }}
-              title="Eingebaut">B</span>
-      ) : (
-        <button onClick={onDelete} title="Loeschen"
-          style={{ background: 'transparent', border: 'none',
-                    padding: 0, cursor: 'pointer',
-                    color: 'var(--text-muted)',
-                    display: 'inline-flex', alignItems: 'center',
-                    justifyContent: 'center' }}
-          onMouseEnter={(e) => e.currentTarget.style.color = 'var(--accent)'}
-          onMouseLeave={(e) => e.currentTarget.style.color = 'var(--text-muted)'}>
-          <Icon name="close" size={14} />
-        </button>
-      )}
+    <div onClick={onSelect}
+      style={{
+        display: 'grid', gridTemplateColumns: '14px 1fr 14px',
+        alignItems: 'center', gap: 6,
+        padding: '4px 10px',
+        cursor: 'pointer',
+        background: isSelected ? 'var(--accent-dim)' : 'transparent',
+        borderLeft: '2px solid ' + (isSelected ? 'var(--accent)' : 'transparent'),
+        transition: 'background 0.12s',
+      }}
+      onMouseEnter={(e) => {
+        if (!isSelected) e.currentTarget.style.background = 'var(--bg-item-hover)'
+      }}
+      onMouseLeave={(e) => {
+        if (!isSelected) e.currentTarget.style.background = 'transparent'
+      }}>
+      <div style={{
+        width: 14, height: 14, borderRadius: 3,
+        background: mat.color || '#888888',
+        border: '1px solid var(--border-light)',
+      }} title={mat.color} />
+      <span style={{
+        fontSize: 11,
+        color: isSelected ? 'var(--text-primary)' : 'var(--text-primary)',
+        fontWeight: isSelected ? 500 : 400,
+        overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
+      }}>{mat.name || 'Unbenannt'}</span>
+      <span style={{
+        fontSize: 9, fontWeight: 600,
+        color: isLibrary ? 'var(--accent)'
+              : isBuiltin ? 'var(--text-muted)'
+              : 'transparent',
+        textAlign: 'center',
+      }} title={isLibrary ? 'Library' : isBuiltin ? 'Builtin' : 'Lokal'}>
+        {isLibrary ? 'L' : isBuiltin ? 'B' : ''}
+      </span>
+    </div>
+  )
+}
+
+/* Slider — Pill-Track mit Accent-Fill, Wert rechts daneben */
+function Slider({ label, value, onChange, min = 0, max = 1, step = 0.01,
+                  display, disabled }) {
+  const v = value ?? min
+  const pct = ((v - min) / (max - min)) * 100
+  return (
+    <div style={{ padding: '4px 0' }}>
+      <div style={{ display: 'flex', alignItems: 'center', gap: 10 }}>
+        <span style={{ flex: 1, fontSize: 11,
+                        color: disabled ? 'var(--text-muted)' : 'var(--text-primary)' }}>
+          {label}
+        </span>
+        <span style={{ fontSize: 10, color: 'var(--text-muted)',
+                        fontFamily: 'var(--font-mono)', minWidth: 40,
+                        textAlign: 'right' }}>
+          {display !== undefined ? display : v.toFixed(2)}
+        </span>
+      </div>
+      <input type="range"
+        min={min} max={max} step={step} value={v}
+        disabled={disabled}
+        onChange={(ev) => onChange(parseFloat(ev.target.value))}
+        style={{
+          width: '100%', marginTop: 4,
+          accentColor: 'var(--accent)',
+          opacity: disabled ? 0.5 : 1,
+        }} />
+    </div>
+  )
+}
+
+/* TextureSlot — Datei-Picker + Vorschau-Mini-Tile + Clear-Button.
+   tex: {path: string} oder null */
+function TextureSlot({ label, slot, tex, onChange, disabled }) {
+  const hasPath = !!(tex && tex.path)
+  const filename = hasPath ? tex.path.split('/').pop() : ''
+  return (
+    <div style={{ padding: '5px 0' }}>
+      <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+        <div style={{
+          width: 36, height: 36, borderRadius: 4,
+          background: hasPath
+            ? `url(file://${tex.path}) center/cover, var(--bg-input)`
+            : 'var(--bg-input)',
+          border: '1px solid var(--border)',
+          flexShrink: 0,
+          display: 'flex', alignItems: 'center', justifyContent: 'center',
+        }}>
+          {!hasPath && (
+            <Icon name="image" size={14}
+                  style={{ color: 'var(--text-muted)', opacity: 0.5 }} />
+          )}
+        </div>
+        <div style={{ flex: 1, minWidth: 0 }}>
+          <div style={{ fontSize: 11, color: 'var(--text-primary)',
+                         letterSpacing: '0.01em' }}>{label}</div>
+          <div style={{ fontSize: 9, color: 'var(--text-muted)',
+                         marginTop: 2,
+                         overflow: 'hidden', textOverflow: 'ellipsis',
+                         whiteSpace: 'nowrap' }}
+                title={hasPath ? tex.path : ''}>
+            {hasPath ? filename : 'Keine Textur'}
+          </div>
+        </div>
+        <BarButton icon="folder_open"
+          onClick={() => pickTextureFile(slot)}
+          title="Datei waehlen"
+          disabled={disabled} />
+        {hasPath && (
+          <BarButton icon="close"
+            onClick={() => onChange(null)}
+            title="Textur entfernen"
+            disabled={disabled} />
+        )}
+      </div>
+    </div>
+  )
+}
+
+/* DetailSection — Section-Header + Body, immer offen (collapsible spaeter) */
+function DetailSection({ title, children }) {
+  return (
+    <div style={{ marginBottom: 14 }}>
+      <div style={{
+        fontSize: 9, fontWeight: 600,
+        color: 'var(--text-muted)',
+        letterSpacing: '0.08em', textTransform: 'uppercase',
+        padding: '4px 0', marginBottom: 6,
+        borderBottom: '1px solid var(--border-light)',
+      }}>{title}</div>
+      {children}
+    </div>
+  )
+}
+
+/* MaterialDetail — rechte Seite (ArchiCAD-Stil): editiert das aktuell
+   ausgewaehlte Material. Builtin: Name read-only. */
+function MaterialDetail({ mat, isBuiltin, hatchPatterns, onChange, onDelete }) {
+  if (!mat) {
+    return (
+      <div style={{ padding: 40, textAlign: 'center',
+                     color: 'var(--text-muted)', fontSize: 11 }}>
+        Kein Material ausgewaehlt.
+        <div style={{ marginTop: 8, fontSize: 10 }}>
+          Wähle links oder lege ein neues an.
+        </div>
+      </div>
+    )
+  }
+  const isLibrary = mat.source === 'library'
+  return (
+    <div style={{ padding: '12px 14px',
+                   display: 'flex', flexDirection: 'column',
+                   height: '100%', overflowY: 'auto' }}>
+      {/* Identitaet */}
+      <div style={{ display: 'flex', alignItems: 'center', gap: 10,
+                     marginBottom: 14 }}>
+        <div style={{
+          width: 56, height: 56, borderRadius: 8,
+          background: mat.color || '#888888',
+          border: '1px solid var(--border)',
+          flexShrink: 0,
+        }} />
+        <div style={{ flex: 1, minWidth: 0 }}>
+          <input type="text" value={mat.name || ''}
+            onChange={(ev) => onChange({ ...mat, name: ev.target.value })}
+            disabled={isBuiltin}
+            placeholder="Material-Name"
+            style={{ width: '100%', height: BAR_H, padding: '0 12px',
+                      fontSize: 12, fontWeight: 500,
+                      opacity: isBuiltin ? 0.7 : 1 }} />
+          <div style={{ fontSize: 9, color: 'var(--text-muted)',
+                         marginTop: 4, letterSpacing: '0.04em' }}>
+            {isLibrary ? 'Aus Dossier-Library'
+              : isBuiltin ? 'Eingebaut (Builtin)'
+              : 'Lokales Material'}
+          </div>
+        </div>
+        {!isBuiltin && onDelete && (
+          <BarButton icon="delete" onClick={onDelete}
+                      title="Material loeschen" />
+        )}
+      </div>
+
+      <DetailSection title="Oberflächenfarbe">
+        <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+          <input type="color" value={mat.color || '#888888'}
+            onChange={(ev) => onChange({ ...mat, color: ev.target.value })}
+            title="Farbe"
+            style={{ width: 32, height: BAR_H, padding: 0, border: 'none',
+                      background: 'transparent', cursor: 'pointer' }} />
+          <input type="text"
+            value={mat.color || '#888888'}
+            onChange={(ev) => onChange({ ...mat, color: ev.target.value })}
+            style={{ flex: 1, height: BAR_H, padding: '0 12px',
+                      fontSize: 11, fontFamily: 'var(--font-mono)' }} />
+        </div>
+      </DetailSection>
+
+      <DetailSection title="Schraffur (2D-Schnitt)">
+        <div style={{ display: 'flex', gap: 8, alignItems: 'center' }}>
+          <select value={mat.hatch || 'Solid'}
+            onChange={(ev) => onChange({ ...mat, hatch: ev.target.value })}
+            style={{ flex: 1, height: BAR_H, fontSize: 11 }}>
+            {(hatchPatterns || []).map(h => (
+              <option key={h} value={h}>{h}</option>
+            ))}
+          </select>
+          <input type="number" step="0.1" min="0.1"
+            value={mat.scale ?? 1.0}
+            onChange={(ev) => onChange({ ...mat, scale: parseFloat(ev.target.value) || 1.0 })}
+            title="Skalierung"
+            style={{ width: 70, height: BAR_H, padding: '0 10px',
+                      fontSize: 11, textAlign: 'right' }} />
+        </div>
+        <div style={{ fontSize: 9, color: 'var(--text-muted)', marginTop: 4 }}>
+          Hatch-Pattern + Skalierung fuer die Sektion-Ansicht (Clipping Plane).
+        </div>
+      </DetailSection>
+
+      <DetailSection title="Texturen (3D-Render)">
+        <TextureSlot label="Diffuse" slot="diffuse"
+          tex={mat.textures?.diffuse}
+          onChange={(t) => onChange({ ...mat, textures: {
+            ...(mat.textures || {}), diffuse: t } })}
+          disabled={isBuiltin} />
+        <TextureSlot label="Bump / Normal" slot="bump"
+          tex={mat.textures?.bump}
+          onChange={(t) => onChange({ ...mat, textures: {
+            ...(mat.textures || {}), bump: t } })}
+          disabled={isBuiltin} />
+        <TextureSlot label="Roughness" slot="roughness"
+          tex={mat.textures?.roughness}
+          onChange={(t) => onChange({ ...mat, textures: {
+            ...(mat.textures || {}), roughness: t } })}
+          disabled={isBuiltin} />
+        <TextureSlot label="Transparenz (Alpha)" slot="transparency"
+          tex={mat.textures?.transparency}
+          onChange={(t) => onChange({ ...mat, textures: {
+            ...(mat.textures || {}), transparency: t } })}
+          disabled={isBuiltin} />
+        <div style={{ marginTop: 4 }}>
+          <InlineNumberField label="UV-Skalierung"
+            value={mat.uvScaleM ?? 1.0}
+            step={0.1} min={0.01} suffix="m"
+            onChange={(v) => onChange({ ...mat, uvScaleM: v || 1.0 })}
+            hint="1 Welt-Meter ≙ wieviel Textur-Tile" />
+        </div>
+      </DetailSection>
+
+      <DetailSection title="Oberflächen-Eigenschaften (PBR)">
+        <Slider label="Rauheit (Roughness)"
+          value={mat.roughness ?? 0.7}
+          onChange={(v) => onChange({ ...mat, roughness: v })}
+          disabled={isBuiltin} />
+        <Slider label="Reflexion"
+          value={mat.reflection ?? 0.1}
+          onChange={(v) => onChange({ ...mat, reflection: v })}
+          disabled={isBuiltin} />
+        <Slider label="Transparenz"
+          value={mat.transparency ?? 0.0}
+          onChange={(v) => onChange({ ...mat, transparency: v })}
+          disabled={isBuiltin} />
+        <Slider label="IoR (Brechungsindex)"
+          value={mat.iorN ?? 1.0}
+          min={1.0} max={2.5} step={0.01}
+          display={(mat.iorN ?? 1.0).toFixed(2)}
+          onChange={(v) => onChange({ ...mat, iorN: v })}
+          disabled={isBuiltin} />
+      </DetailSection>
     </div>
   )
 }
@@ -115,9 +354,68 @@ export default function ProjectSettingsDialog({
     defaults:  { ...(initial.defaults || {}) },
     materials: [...(initial.materials || [])],
   }))
+  const [selMat, setSelMat] = useState(() => {
+    // Default-Auswahl: erstes Builtin wenn vorhanden, sonst erstes Local
+    const b = initial.builtinMaterials || []
+    if (b.length) return { kind: 'builtin', name: b[0].name }
+    const m = initial.materials || []
+    if (m.length) return { kind: 'local', idx: 0 }
+    return null
+  })
+  const [matSearch, setMatSearch] = useState('')
   const builtin = initial.builtinMaterials || []
   const hatchPatterns = initial.hatchPatterns || ['Solid']
 
+  // Aktuell ausgewaehltes Material aus Selection ableiten
+  const selectedMat = (() => {
+    if (!selMat) return null
+    if (selMat.kind === 'builtin') return builtin.find(m => m.name === selMat.name) || null
+    if (selMat.kind === 'local')   return draft.materials[selMat.idx] || null
+    return null
+  })()
+  const selectedIsBuiltin = selMat?.kind === 'builtin'
+  const updateSelected = (newMat) => {
+    if (!selMat) return
+    if (selMat.kind === 'local') {
+      setMat(selMat.idx, newMat)
+    }
+    // builtin: Schreibend in Phase 1 nur Color/Hatch — Backend ignoriert
+    // Name-Aenderungen. UI laesst diese sowieso disabled.
+  }
+  const deleteSelected = () => {
+    if (selMat?.kind !== 'local') return
+    delMat(selMat.idx)
+    setSelMat(null)
+  }
+
+  // Backend-File-Picker-Antwort: aktualisiert das Slot im aktuell
+  // selektierten Material. Wenn path leer = User abgebrochen → no-op.
+  useEffect(() => {
+    onMessage('TEXTURE_PICKED', ({ slot, path }) => {
+      if (!path || !selMat || selMat.kind !== 'local') return
+      setDraft(d => ({
+        ...d,
+        materials: d.materials.map((m, i) => {
+          if (i !== selMat.idx) return m
+          const newTex = (m.textures && typeof m.textures === 'object')
+            ? { ...m.textures } : {}
+          newTex[slot] = { path }
+          return { ...m, textures: newTex }
+        }),
+      }))
+    })
+  }, [selMat])
+  // Suchbar — case-insensitive substring auf Name
+  const matchSearch = (m) => {
+    const q = matSearch.trim().toLowerCase()
+    if (!q) return true
+    return (m.name || '').toLowerCase().includes(q)
+  }
+  const filteredBuiltin = builtin.filter(matchSearch)
+  const filteredLocal = draft.materials
+    .map((m, i) => ({ m, i }))
+    .filter(({ m }) => matchSearch(m))
+
   const setDefault = (k, v) =>
     setDraft(d => ({ ...d, defaults: { ...d.defaults, [k]: v } }))
 
@@ -127,18 +425,17 @@ export default function ProjectSettingsDialog({
   const delMat = (i) => setDraft(d => ({
     ...d, materials: d.materials.filter((_, idx) => idx !== i),
   }))
-  const addMat = () => setDraft(d => ({
-    ...d,
-    materials: [...d.materials, {
-      name: 'Neues Material', color: '#aaaaaa',
-      hatch: 'Solid', scale: 1.0,
-      source: 'local', libraryId: null,
-    }],
-  }))
-
-  const numberInputStyle = {
-    flex: 1, height: BAR_H, padding: '0 12px',
-    fontSize: 11, textAlign: 'right',
+  const addMat = () => {
+    setDraft(d => ({
+      ...d,
+      materials: [...d.materials, {
+        name: 'Neues Material', color: '#aaaaaa',
+        hatch: 'Solid', scale: 1.0,
+        source: 'local', libraryId: null,
+      }],
+    }))
+    // Direkt selektieren — User kann gleich editieren
+    setSelMat({ kind: 'local', idx: draft.materials.length })
   }
 
   const wrapperStyle = embedded ? {
@@ -166,82 +463,120 @@ export default function ProjectSettingsDialog({
         <div style={{ flex: 1, minHeight: 0, overflowY: 'auto',
                        padding: '8px 14px' }}>
           {tab === 'defaults' && (
-            <>
+            <div style={{ maxWidth: 520 }}>
               <div style={{ fontSize: 10, color: 'var(--text-muted)',
                              padding: '6px 0 10px', lineHeight: 1.5 }}>
                 Voreinstellungen fuer neue Elemente. Pro-Element editierte
                 Werte bleiben davon unberuehrt.
               </div>
-              <Field label="Standard-Geschosshöhe (m)"
-                     hint="Vorgabe fuer neue Geschosse — pro Geschoss ueberschreibbar">
-                <input type="number" step="0.05" min="1.0" max="10"
+              <DetailSection title="Geschoss">
+                <InlineNumberField label="Standard-Geschosshöhe"
                   value={draft.defaults.geschossHoehe ?? 3.0}
-                  onChange={(ev) => setDefault('geschossHoehe', parseFloat(ev.target.value) || 3.0)}
-                  style={numberInputStyle} />
-              </Field>
-              <Field label="Standard-Schnitthöhe (m)"
-                     hint="Höhe der horizontalen Schnitt-Plane über OKFF eines Geschosses">
-                <input type="number" step="0.05" min="0.1" max="3"
+                  step={0.05} min={1.0} max={10} suffix="m"
+                  onChange={(v) => setDefault('geschossHoehe', v || 3.0)}
+                  hint="Vorgabe fuer neue Geschosse — pro Geschoss ueberschreibbar" />
+                <InlineNumberField label="Standard-Schnitthöhe"
                   value={draft.defaults.schnitthoehe ?? 1.0}
-                  onChange={(ev) => setDefault('schnitthoehe', parseFloat(ev.target.value) || 1.0)}
-                  style={numberInputStyle} />
-              </Field>
-              <div style={{ height: 1, background: 'var(--border-light)',
-                             margin: '12px 0' }} />
-              <Field label="Standard-Schnitt-Tiefe hinten (m)"
-                     hint="Default-Tiefe fuer neue Schnitte/Ansichten">
-                <input type="number" step="0.5" min="0.5"
+                  step={0.05} min={0.1} max={3} suffix="m"
+                  onChange={(v) => setDefault('schnitthoehe', v || 1.0)}
+                  hint="Höhe der horizontalen Schnitt-Plane über OKFF eines Geschosses" />
+              </DetailSection>
+              <DetailSection title="Schnitte / Ansichten">
+                <InlineNumberField label="Standard-Tiefe hinten"
                   value={draft.defaults.schnittDepthBack ?? 8.0}
-                  onChange={(ev) => setDefault('schnittDepthBack', parseFloat(ev.target.value) || 8.0)}
-                  style={numberInputStyle} />
-              </Field>
-              <div style={{ display: 'flex', gap: 8 }}>
-                <Field label="Höhe unten (m)" style={{ flex: 1 }}>
-                  <input type="number" step="0.1"
-                    value={draft.defaults.schnittHeightMin ?? -1.0}
-                    onChange={(ev) => setDefault('schnittHeightMin', parseFloat(ev.target.value))}
-                    style={numberInputStyle} />
-                </Field>
-                <Field label="Höhe oben (m)" style={{ flex: 1 }}>
-                  <input type="number" step="0.1"
-                    value={draft.defaults.schnittHeightMax ?? 12.0}
-                    onChange={(ev) => setDefault('schnittHeightMax', parseFloat(ev.target.value))}
-                    style={numberInputStyle} />
-                </Field>
-              </div>
-            </>
+                  step={0.5} min={0.5} suffix="m"
+                  onChange={(v) => setDefault('schnittDepthBack', v || 8.0)}
+                  hint="Default-Tiefe fuer neue Schnitte/Ansichten" />
+                <InlineNumberField label="Höhe unten"
+                  value={draft.defaults.schnittHeightMin ?? -1.0}
+                  step={0.1} suffix="m"
+                  onChange={(v) => setDefault('schnittHeightMin', v)} />
+                <InlineNumberField label="Höhe oben"
+                  value={draft.defaults.schnittHeightMax ?? 12.0}
+                  step={0.1} suffix="m"
+                  onChange={(v) => setDefault('schnittHeightMax', v)} />
+              </DetailSection>
+            </div>
           )}
 
           {tab === 'materials' && (
-            <>
-              <div style={{ fontSize: 10, color: 'var(--text-muted)',
-                             padding: '6px 0 10px', lineHeight: 1.5 }}>
-                Eingebaute Materialien (B) — Farbe + Hatch anpassbar, Name fix.
-                Library-Materialien (L) aus Dossier-Library importiert.
-                Lokale Materialien frei editierbar.
+            <div style={{ display: 'flex', height: '100%',
+                           margin: '-8px -14px',  /* Tab-Padding aufheben */
+                           minHeight: 0 }}>
+              {/* Links: Liste */}
+              <div style={{
+                width: 240, flexShrink: 0,
+                display: 'flex', flexDirection: 'column',
+                borderRight: '1px solid var(--border)',
+                background: 'var(--bg-dialog)',
+              }}>
+                <div style={{ padding: '8px 10px',
+                               borderBottom: '1px solid var(--border-light)' }}>
+                  <input type="text" value={matSearch}
+                    onChange={(ev) => setMatSearch(ev.target.value)}
+                    placeholder="Suchen…"
+                    style={{ width: '100%', height: BAR_H,
+                              padding: '0 12px', fontSize: 11,
+                              boxSizing: 'border-box' }} />
+                </div>
+                <div style={{ flex: 1, overflowY: 'auto',
+                               padding: '4px 0' }}>
+                  {filteredBuiltin.length > 0 && (
+                    <div style={{ fontSize: 8, fontWeight: 600,
+                                   color: 'var(--text-muted)',
+                                   padding: '6px 12px 2px',
+                                   letterSpacing: '0.1em',
+                                   textTransform: 'uppercase' }}>
+                      Eingebaut
+                    </div>
+                  )}
+                  {filteredBuiltin.map((m) => (
+                    <MaterialListRow key={'b_' + m.name}
+                      mat={m} isBuiltin
+                      isSelected={selMat?.kind === 'builtin' && selMat.name === m.name}
+                      onSelect={() => setSelMat({ kind: 'builtin', name: m.name })} />
+                  ))}
+                  {filteredLocal.length > 0 && (
+                    <div style={{ fontSize: 8, fontWeight: 600,
+                                   color: 'var(--text-muted)',
+                                   padding: '10px 12px 2px',
+                                   letterSpacing: '0.1em',
+                                   textTransform: 'uppercase' }}>
+                      Projekt
+                    </div>
+                  )}
+                  {filteredLocal.map(({ m, i }) => (
+                    <MaterialListRow key={'u_' + i}
+                      mat={m}
+                      isSelected={selMat?.kind === 'local' && selMat.idx === i}
+                      onSelect={() => setSelMat({ kind: 'local', idx: i })} />
+                  ))}
+                  {filteredBuiltin.length === 0 && filteredLocal.length === 0 && (
+                    <div style={{ padding: 20, textAlign: 'center',
+                                   color: 'var(--text-muted)', fontSize: 10 }}>
+                      Nichts gefunden.
+                    </div>
+                  )}
+                </div>
+                <div style={{ display: 'flex', gap: 4,
+                               padding: '6px 8px',
+                               borderTop: '1px solid var(--border-light)' }}>
+                  <BarToggle icon="add" onClick={addMat}
+                    title="Neues Material" />
+                  <BarToggle icon="inventory_2" onClick={openLibrary}
+                    title="Aus Library importieren" />
+                </div>
               </div>
-              {builtin.map((m) => (
-                <MaterialRow key={'b_' + m.name}
-                  mat={m}
-                  builtin
+              {/* Rechts: Detail */}
+              <div style={{ flex: 1, minWidth: 0, overflow: 'hidden' }}>
+                <MaterialDetail
+                  mat={selectedMat}
+                  isBuiltin={selectedIsBuiltin}
                   hatchPatterns={hatchPatterns}
-                  onChange={() => {/* read-only Phase 1 */}} />
-              ))}
-              {draft.materials.map((m, i) => (
-                <MaterialRow key={'u_' + i}
-                  mat={m}
-                  hatchPatterns={hatchPatterns}
-                  onChange={(nm) => setMat(i, nm)}
-                  onDelete={() => delMat(i)} />
-              ))}
-              <div style={{ display: 'flex', gap: 6, marginTop: 12 }}>
-                <BarToggle icon="add" label="Material" onClick={addMat}
-                  title="Neues Material anlegen" />
-                <BarToggle icon="inventory_2" label="Library"
-                  onClick={openLibrary}
-                  title="Material aus Dossier-Library importieren" />
+                  onChange={updateSelected}
+                  onDelete={selMat?.kind === 'local' ? deleteSelected : null} />
               </div>
-            </>
+            </div>
           )}
         </div>
 

src/lib/rhinoBridge.js

@@ -189,6 +189,11 @@ export function toggleGridVisible(on) { send('TOGGLE_GRID_VISIBLE', { visible: !
 export function openProjectSettings() { send('OPEN_PROJECT_SETTINGS', {}) }
 // Dossier-Library (Material-/Symbol-/Object-Templates, Phase A: lokal+material)
 export function openLibrary() { send('OPEN_LIBRARY', {}) }
+// Material-Textur: macOS-File-Picker oeffnen, Antwort kommt via
+// TEXTURE_PICKED-Message mit {slot, path}.
+export function pickTextureFile(slot) {
+  send('PICK_TEXTURE_FILE', { slot: slot || 'diffuse' })
+}
 // Schnitt/Ansicht — interaktiver 2-Punkt-Pick im Rhino-Viewport. Erzeugt
 // eine neue Zeichnungsebene type=schnitt + 2D-Plan-Symbol + aktiviert sie.
 // opts: { cutAtLine: bool, depthBack: m, heightMin: m, heightMax: m, namePrefix }