Category Environment Lighting

Topics about lighting in games.

Physically Based Rendering

Physically based rendering in games Polycount forum thread
Game environments – Part A: rendering Remember Me on fxguide.com
Physically Based Rendering for Artists by Andrew Maximov
Albedo is pure colour, no lighting information baked in like we do currently with diffuse maps.
Roughness is calculated in a specifically measured way and requires a 0-1 input only. Gloss can interpolate that input to a greater range where Roughness "shouldn't".
Reflectance is again, a measured value for a material. there are plenty of sources online which you can get the measured reflective colours for various materials. typically speaking, most non-metals fall into a white 0.04 range, while metals (having no albedo and being pure reflection) have much higher, coloured reflectance. Specular is something that, along with gloss, artists have to fudge to get a pleasing look.
Overall, PBR is more about measured results rather than mixing in 3 different maps in different proportions to achieve a look.

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