I keep seeing Ai 3D tools popping up but this one caught my attention, full PBR work flow, janky but definitely more refinded then the last time I looked. https://app.meshy.ai/workspace/text-to-3d https://www.youtube.com/watch?v=49jT2JutYXs
I think this should help out http://www.marmoset.co/toolbag/learn/pbr-practice In this case... diffuse = albedo roughness = microsurface specular = reflectivity
That's one of the driving factors behind the shift to pbr in games.It helps to ensure consistency. Whole pipelines are now built around Substance Designer, for instance.