message: Better albedo for sheen layer
diff: @@ -178,7 +178,7 @@ inline void MicrofacetSheenLayer_Constructor(varying MicrofacetSheenLayer* unifo
  vec3f R, float roughness,
  float weight)
  {
  - BSDF_Constructor(&self->super, lerp(weight, substrate->albedo, R), // TODO check
  + BSDF_Constructor(&self->super, lerp(weight*0.1f, substrate->albedo, R), // lean towards substrate (sheen is only at edge)
  BSDF_DIFFUSE_REFLECTION | substrate->type,
  MicrofacetSheenLayer_eval, MicrofacetSheenLayer_sample,
  frame);
  