d'Eon Lambertian Spheres

https://gyazo.com/6f5bb09be76da0fddb782a223fe998df

This is a special mode designed only for rough materials. Think here, for example, of small-pored or dusty surfaces. One characteristic of this is, among other things, an increase in color saturation with very flat incident light.

Roughness が高い Material のエネルギー損失を抑える(黒っぽくならない) ための計算モデル