Fixed marshaling of multi-dimensional arrays of QGLTextures, and add a second unlit material layer with additive blending for models that use fullbright textures

Assets/Scripts/Data/QModel.cs

@@ -117,8 +117,8 @@ public class QAliasHeader
     public int poseVerts;
     public int poseData;
     public int commands;
-    [MarshalAs(UnmanagedType.ByValArray, SizeConst = QConstants.MaxSkins)] public IntPtr[] glTextures;
-    [MarshalAs(UnmanagedType.ByValArray, SizeConst = QConstants.MaxSkins)] public IntPtr[] fbTextures;
+    [MarshalAs(UnmanagedType.ByValArray, SizeConst = QConstants.MaxSkins * 4)] public IntPtr[] glTextures;
+    [MarshalAs(UnmanagedType.ByValArray, SizeConst = QConstants.MaxSkins * 4)] public IntPtr[] fbTextures;
     [MarshalAs(UnmanagedType.ByValArray, SizeConst = QConstants.MaxSkins)] public int[] texels;
 
     // Actually variable sized, but we receive an additional pointer to the first element so we can manually marshal the entire array

Assets/Scripts/Modules/RenderModule.Interop.cs

@@ -72,8 +72,8 @@ public partial class RenderModule: CallbackHandler<RenderModule>
         var fbTextures = new QGLTexture[QConstants.MaxSkins][];
         for (int i = 0; i < QConstants.MaxSkins; ++i)
         {
-            glTextures[i] = header.glTextures[i].ToStructArray<QGLTexture>(4);
-            fbTextures[i] = header.fbTextures[i].ToStructArray<QGLTexture>(4);
+            glTextures[i] = header.glTextures[i * 4].ToStructArray<QGLTexture>(4);
+            fbTextures[i] = header.fbTextures[i * 4].ToStructArray<QGLTexture>(4);
         }
 
         return GetSelf(target).UploadAliasModel(

Assets/Scripts/Modules/RenderModule.cs

@@ -64,10 +64,27 @@ public partial class RenderModule
             material.mainTexture = textures[texNum];
         }
 
+        Material fbMaterial = null;
+        if (fbTextures != null && fbTextures[0] != null && fbTextures[0][0] != null)
+        {
+            var fbTexNum = fbTextures[0][0].texNum;
+            if (fbTexNum > 0 && textures.ContainsKey(fbTexNum))
+            {
+                fbMaterial = new Material(Shader.Find("Universal Render Pipeline/Unlit"));
+                fbMaterial.mainTexture = textures[fbTexNum];
+                fbMaterial.SetFloat("_Surface", 1); // Transparent
+                fbMaterial.SetFloat("_Blend", 2);   // Additive
+            }
+        }
+
         if (header.numPoses > 1)
         {
             var mr = go.AddComponent<SkinnedMeshRenderer>();
+            if (fbMaterial != null)
+                mr.materials = new[] { material, fbMaterial };
+            else
                 mr.material = material;
+            
             mr.sharedMesh = mesh;
             mr.shadowCastingMode = ShadowCastingMode.Off;
             mr.receiveShadows = false;
@@ -82,7 +99,11 @@ public partial class RenderModule
             var mf = go.AddComponent<MeshFilter>();
             mf.sharedMesh = mesh;
             var mr = go.AddComponent<MeshRenderer>();
+            if (fbMaterial != null)
+                mr.materials = new[] { material, fbMaterial };
+            else
                 mr.material = material;
+            
             mr.shadowCastingMode = ShadowCastingMode.Off;
             mr.receiveShadows = false;
             mr.lightProbeUsage = LightProbeUsage.Off;