Rewrite AmbientLight into a class, stub Handle AmbientLightKind::LightMapProbeVolume and AmbientLightKind::EnvMap Move BRDF stuff to BRDF.hlsl, organizes it and makes it easier to move to CS2's one with multiscatter Adjustments for AmbientLight, disable subsurface scattering for this class for now ToolsVis ambient occlusion doesn't take AmbientLight Lightmapping combos go on shadingmodel, Lightmapping definiton should be in shadingmodel.hlsl not Material.hlsl, material should be only a contract to shadingmodels