// Reference Lambert diffuse / GGX Specular for IBL and area lights
//#define LIT_DISPLAY_REFERENCE
// TODO: Check if anisotropy with a dynamic if on anisotropy > 0 is performant. Because it may mean we always calculate both isotrpy and anisotropy case.
// TODO: Check if anisotropy with a dynamic if on anisotropy > 0 is performant. Because it may mean we always calculate both isotropy and anisotropy case.
// Helper functions/variable specific to this materia
// Helper functions/variable specific to this material