Hey
Going mad here, but whatever I do, I cant remove the reflection in pathtracer clear coat shader with dual normal mode.
I’m using IBL light source + directional light. Whatever setting I change in UE, the reflection always stays.
The reflection noral is driven by shader normal input, not ClearCoatBottomNormal.
Is this a bug?
It seems that I cant affect it by parameters, It works in Lit mode/gpu, but in pathtracer, its just locked to solid reflection. Roughness/specular/metallic does not really affect it as far as I can tell. The only thing that changes it is normal
Ok I got it figured out… “I think” It seems that in Path Tracer mode, wrong attribute is controling wrong parameter… let me try to explain :
Dual - normal mode has 2 surfaces
- Base
- Clear coat.
They split in :
-
Base is being controlled by
Metallic
Specular
Clear Coat Roughness - IT SHOULD NOT
ClearCoatBottomNormal -
Clear Coat
Clear Coat
Normal
Clear Coat Roughness
What this means is that in path tracer mode, if I want to change roughness of base layer, I cant, because it will also change roughness of top clear coat layer.
This happens only in Path-Tracer mode. In Lit mode everything works as it should.
Actually there are 2 bugs here.
- Clear_coat_Roughness controls both base&clear coat reflection roughness.
- There is NO way to control base reflection strenght/intensity in 1st place. Can’t set it to 0.1 or something like that to be very subtle/weak.
Can any1 confirm this?