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Additional BRDF Models
I've heard some talk that VRay 3.0 is going to introduce Cook-Torrance spec lobes natively into the VRayMtl, I think that's a great step towards rendering more physically plausible images.
I would love to have a few other BRDF models as well though. Most specifically, the Shifted Gamma Micro-Distribution Model (SGD), but it would be great to get GGX too.
We've implemented both these models into our Mantra pipeline with great results, to the point now where other than how cumbersome it is to create Houdini shaders, we're beginning to lean towards rendering with Mantra when it comes to producing the most photo-real images.
Here's some turntables from Mantra of the various models @ 0.2 roughness. Sorry, I think you'll have to download them to play, but I attached jpg stills too. These are mostly just for other forum readers since I know you guys are all very familiar with GGX and SGD too.
Classic Blinn
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/...RDFs/Blinn.jpg
GGX
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/.../BRDFs/GGX.jpg
SGD
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/.../BRDFs/SGD.jpg
And the whitepaper for SGD, but I'm sure you guys have seen this before already:
https://docs.google.com/file/d/0B2cv...it?usp=sharing
Above any features I can think of that we'd love to see you guys implement into VRay, BRDF models would be far and away #1 on the list and would be the biggest upgrade to the package that I can think of. The research community has come a very long way since Blinn and Ward.
I don't even mind if they're just hidden for now in the VRay -> Create from Plugin menu.
Cheers guys, and thanks again for all the hard work you do on VRay.
I would love to have a few other BRDF models as well though. Most specifically, the Shifted Gamma Micro-Distribution Model (SGD), but it would be great to get GGX too.
We've implemented both these models into our Mantra pipeline with great results, to the point now where other than how cumbersome it is to create Houdini shaders, we're beginning to lean towards rendering with Mantra when it comes to producing the most photo-real images.
Here's some turntables from Mantra of the various models @ 0.2 roughness. Sorry, I think you'll have to download them to play, but I attached jpg stills too. These are mostly just for other forum readers since I know you guys are all very familiar with GGX and SGD too.
Classic Blinn
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/...RDFs/Blinn.jpg
GGX
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/.../BRDFs/GGX.jpg
SGD
https://docs.google.com/file/d/0B2cv...it?usp=sharing
https://dl.dropboxusercontent.com/u/.../BRDFs/SGD.jpg
And the whitepaper for SGD, but I'm sure you guys have seen this before already:
https://docs.google.com/file/d/0B2cv...it?usp=sharing
Above any features I can think of that we'd love to see you guys implement into VRay, BRDF models would be far and away #1 on the list and would be the biggest upgrade to the package that I can think of. The research community has come a very long way since Blinn and Ward.
I don't even mind if they're just hidden for now in the VRay -> Create from Plugin menu.
Cheers guys, and thanks again for all the hard work you do on VRay.
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