We noticed that mia material doesn’t exactly mimic a lambertian diffuse but instead it does compress a bit the terminator. So for those that were used to that we implemented two different models for lambertian diffuse.
Lambert
Mia material
A side note is that Mila material instead is a full Lambert.
We’re adding other diffuse models like Hanrahan-Krueger, Lommel-Seeliger etc.