Broken UI system

Runtime/PSXSceneExporter.cs

@@ -55,6 +55,10 @@ namespace SplashEdit.RuntimeCode
         // Phase 5: Room/portal system (interior scenes)
         private PSXRoomBuilder _roomBuilder;
 
+        // Phase 6: UI canvases
+        private PSXCanvasData[] _canvases;
+        private PSXFontData[] _fonts;
+
         private PSXData _psxData;
 
         private Vector2 selectedResolution;
@@ -106,9 +110,27 @@ namespace SplashEdit.RuntimeCode
             _interactables = FindObjectsByType<PSXInteractable>(FindObjectsSortMode.None);
             _audioSources = FindObjectsByType<PSXAudioSource>(FindObjectsSortMode.None);
 
+            // Collect UI image textures for VRAM packing alongside 3D textures
+            PSXUIImage[] uiImages = FindObjectsByType<PSXUIImage>(FindObjectsSortMode.None);
+            List<PSXTexture2D> uiTextures = new List<PSXTexture2D>();
+            foreach (PSXUIImage img in uiImages)
+            {
+                if (img.SourceTexture != null)
+                {
+                    Utils.SetTextureImporterFormat(img.SourceTexture, true);
+                    PSXTexture2D tex = PSXTexture2D.CreateFromTexture2D(img.SourceTexture, img.BitDepth);
+                    tex.OriginalTexture = img.SourceTexture;
+                    img.PackedTexture = tex;
+                    uiTextures.Add(tex);
+                }
+            }
+
             EditorUtility.ClearProgressBar();
 
-            PackTextures();
+            PackTextures(uiTextures);
+
+            // Collect UI canvases after VRAM packing (so PSXUIImage.PackedTexture has valid VRAM coords)
+            _canvases = PSXUIExporter.CollectCanvases(selectedResolution, out _fonts);
 
             PSXPlayer player = FindObjectsByType<PSXPlayer>(FindObjectsSortMode.None).FirstOrDefault();
             if (player != null)
@@ -185,7 +207,7 @@ namespace SplashEdit.RuntimeCode
 #endif
         }
 
-        void PackTextures()
+        void PackTextures(List<PSXTexture2D> additionalTextures = null)
         {
             (Rect buffer1, Rect buffer2) = Utils.BufferForResolution(selectedResolution, verticalLayout);
 
@@ -196,7 +218,7 @@ namespace SplashEdit.RuntimeCode
             }
 
             VRAMPacker tp = new VRAMPacker(framebuffers, prohibitedAreas);
-            var packed = tp.PackTexturesIntoVRAM(_exporters);
+            var packed = tp.PackTexturesIntoVRAM(_exporters, additionalTextures);
             _exporters = packed.processedObjects;
             _atlases = packed.atlases;
 
@@ -260,6 +282,8 @@ namespace SplashEdit.RuntimeCode
                 fogDensity = FogDensity,
                 cutscenes = Cutscenes,
                 audioSources = _audioSources,
+                canvases = _canvases,
+                fonts = _fonts,
             };
 
             PSXSceneWriter.Write(path, in scene, (msg, type) =>