message: gltfio: fix depth writes for transmissive materials.
  This fixes the depth fighting in the column of red spheres in the test
  model while in filamat mode. Thanks Romain for catching this.
  It also makes filamat mode more consistent with ubershader mode.
diff: @@ -389,6 +389,7 @@ Material* createMaterial(Engine* engine, const MaterialKey& config, const UvMap&
  }
  builder.blending(MaterialBuilder::BlendingMode::TRANSPARENT);
  + builder.depthWrite(true);
  } else {
  