Hi all-
Does anyone know of a good and validated way to convert PBR (Physically Based Rendering) material properties to Radiance material properties as PBR materials come with the attributes such as Metalness (0 to 1), Roughness (0 to 1), Normal (0 to 1)?
Thank you!
Can you point to a technical description of the different PBR material parameters?
Cheers,
-Greg
Hi Greg-
this would be a great starting point
https://www.a23d.co/blog/different-maps-in-pbr-textures
but you can find more information under the “Materials” chapter in this document
Thanks
OK, some of these parameters translate well into Radiance; others do not. For example, there’s no such thing as an “ambient occlusion map” in the real world – that’s just a hack to avoid computing interreflections.
Radiance is able to handle maps as input, but you have to figure out yourself how to tile them or map them to surfaces, then apply them to the appropriate material types. The WGMDfunc material we recently introduced in the 6.0a HEAD release is quite flexible in this regard.
I cannot provide you with a simple set of instructions to convert one very sophisticated set of material parameters to another, and as far as I know, you are the first person with this request. It would be great to have a translator from PBR into Radiance (and vice versa), but we have nothing like that at the moment.
I would be happy to answer a more specific question if you have, say, a particular material you are attempting to model in Radiance.
Cheers,
-Greg
Thank you so much for your quick response Gregg.
I really appreciate it!