message: Metal: fix microshadowing artifacts
diff: @@ -67,7 +67,7 @@ struct PixelParams {
  float computeMicroShadowing(float NoL, float visibility) {
  // Chan 2018, "Material Advances in Call of Duty: WWII"
  - float aperture = inversesqrt(1.0 - visibility);
  + float aperture = inversesqrt(1.0 - min(visibility, 0.9999));
  float microShadow = saturate(NoL * aperture);
  return microShadow * microShadow;
  }
  