Convert from PBR to traditional shaders

armagon · Sep 2015

I'm having some problems "downgrading" some textures from PBR to the traditional workflow, with diffuse, spec and normal. I just can't put the lighting information back into the diffuse. Should i generate an AO and put on top of it?

rexus · Sep 2015

yes and maybe even a cavity map

almighty_gir · Sep 2015

depends entirely on the lighting setup of the engine. Some previous gen engines still wanted diffuse without lighting baked in... and really, anything that relies on dynamic lights, or is moving around a lot would benefit from having as little baked in lighting as possible.

cupsster · Sep 2015

AO + Cavity will get back depth you are looking for.

armagon · Sep 2015

Thanks for the help, guys.

beefaroni · Sep 2015

This is super hacky but when using Spec/Gloss PBR I had to use a metalness mask to mask off the parts of the specular map to replace parts of the diffuse map since metals on pbr spec/gloss are black.

Then there were a few levels adjustments/etc and it worked pretty well.

armagon · Sep 2019

I would like to bump this thread because I found this interesting manual on how to do this properly:

Convert from PBR to traditional shaders

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