Use emissive property on default material to simulate fullbright pixels, instead of adding a second unlit material

Assets/Scripts/Modules/RenderModule.cs

@@ -80,26 +80,21 @@ 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
+                material.EnableKeyword("_EMISSION");
+                material.SetTexture("_EmissionMap", textures[fbTexNum]);
+                material.SetColor("_EmissionColor", Color.white);
             }
         }
 
         if (header.numPoses > 1)
         {
             var mr = go.AddComponent<SkinnedMeshRenderer>();
-            if (fbMaterial != null)
-                mr.materials = new[] { material, fbMaterial };
-            else
-                mr.material = material;
+            mr.material = material;
             
             mr.sharedMesh = mesh;
             mr.shadowCastingMode = ShadowCastingMode.Off;
@@ -115,10 +110,7 @@ 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.material = material;
             
             mr.shadowCastingMode = ShadowCastingMode.Off;
             mr.receiveShadows = false;