There's a subtle dark dot when facing a low-roughness surface straight on -
It's very visible when you turn down the roughness very very low.
I'm guessing this is related to BRDF somehow since another BRDF regression produced the same sort of issue, albeit a shininess dot here - https://github.com/bryanedds/Nu/issues/640
Perhaps the BRDF texture is too low-resolution? It's 400x400 with 8-bit color channels and one I got from I forget where on the interweb. I think it needs its R and G channels to be 16-bit however to work properly.
There's a subtle dark dot when facing a low-roughness surface straight on -
It's very visible when you turn down the roughness very very low.
I'm guessing this is related to BRDF somehow since another BRDF regression produced the same sort of issue, albeit a shininess dot here - https://github.com/bryanedds/Nu/issues/640
Perhaps the BRDF texture is too low-resolution? It's 400x400 with 8-bit color channels and one I got from I forget where on the interweb. I think it needs its R and G channels to be 16-bit however to work properly.