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Re: PBR: The Problem with Greyscale Metalness
It would be great to put a source to this because right now you are just saying these as facts with no reference to back it up and what you are saying is contradictory to almost all material I’ve ever discussed. I think there is a misunderstanding of what “energy conservation” is. I totally don’t understand where you are… -
Re: PBR: The Problem with Greyscale Metalness
Sorry Perna, not a very good writer :( With radiance's latest post I think I have a concise breakdown now. @radiancef0rge That's what I'm saying. In the original implementation the metalness workflow is a 2 or more BRDF layered material setup. It lerps between a metal BRDF and a dielectric BRDF artists define, after both… -
Re: PBR: The Problem with Greyscale Metalness
Firstly I don't feel this is off topic at all because it is directly about non-black non-white metallic values, but you seem to still be confused. I really don't want to drag this out, because it goes over artists' heads and is not very helpful information when they can't do anything other than "Well switch to Specular".… -
Re: PBR: The Problem with Greyscale Metalness
Hello guys. Great discussion. A lot of this goes well over my head, but I am trying to learn. I come from a gaming background, but now work in Architectural visualization using VRay, so this stuff takes a slightly different approach. I still try and use a metal/roughness workflow, but the ultimate goal is to have as… -
Re: PBR: The Problem with Greyscale Metalness
You're making irrelevant and inaccurate statements on a thread that is supposed to alleviate misunderstandings and you just keep at it. You're not going to confuse me with technical terms, but it seems you are confusing yourself as you keep backtracking on what you are saying. Variable inputs to the BRDF cannot "lose… -
Re: PBR: The Problem with Greyscale Metalness
Wow, this is very unprofessional and condescending. If you can not even bother to read the original paper that describes the impementation of a metalness workflow in an offline renderer, then why do you insist on disregarding my post out of hand? You completely ignore my reduction to microfacets which is the theory on… -
Re: PBR: The Problem with Greyscale Metalness
Excellent post Chris; I was thinking while reading the other recent thread about the whole metalness '1 or 0 only, or is greyscale fine too' that the confusion comes from not knowing how the engine handles the optimised albedo with grey metalness values - I wasn't even sure it was a linear interpolation for instance,… -
Re: PBR: The Problem with Greyscale Metalness
Good heavens... I think my virginity might have come back after reading this thread -
Re: PBR: The Problem with Greyscale Metalness
Thanks Radiance, I can't believe I didn't come across this information earlier. Much appreciated. -
Re: PBR: The Problem with Greyscale Metalness
My little finger tells me this the whole misunderstanding comes from a big confusion between: 1 - Some real-life scientific facts ("what are the characteristics of metals and non-metals ?") 2 - A simplified model that some engines rely on ("in our engine, it is best do use 100% white and 100% black for metalness input for…
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