message: Fix material color.
diff: @@ -77,8 +77,8 @@ void decodeMaterialParams(vec3 params) {
  const decodeMaterialColor = `
  void decodeMaterialColor(vec4 rgba) {
  - mat_rgb = vec4(rgba.rgb, floor(rgba.r + 0.5));
  - mat_alpha = vec2(rgba.a, floor(rgba.a + 0.5));
  + mat_rgb = vec4(rgba.rgb, float(rgba.r >= 0.0));
  + mat_alpha = vec2(rgba.a, float(rgba.a >= 0.0));
  }`;
  /** @internal */
  