I don’t know if this forum is the right place for this question since it concerns a very technical nuance, so please direct me elsewhere if this is not the right place.
I have noticed that in the path tracer, the diffuse lobe is attenuated by (1-Spec.E) in the ClearCoat model, but not in the DefaultLit model.
In the “regular” real-time implementation however, this situation is reversed. The clear coat model does not attenuate the diffuse lobe, but the DefaultLit model does.
Which one of these is the intended behaviour of the lighting model(s)?
I thought the (1-Spec.E) factor should have been approximately handled using the base color + metallic parameterization?
Regards,
Tom