// Combination need to be define in increasing "comlexity" order as define by FeatureFlagsToTileVariant
static const uint kFeatureVariantFlags[NUM_FEATURE_VARIANTS] =
{
// Precomputed illumination (no dynamic lights) for all material types (except for the clear coat)
/* 0 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_ENV | ( MATERIAL_FEATURE_MASK_FLAGS & (~MATERIALFEATUREFLAGS_LIT_CLEAR_COAT)) ,
// Precomputed illumination (no dynamic lights) for all material types
/* 0 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_ENV | MATERIAL_FEATURE_MASK_FLAGS,
// Standard>Specular
/* 1 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 2 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 3 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 4 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 5 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_STANDARD ,
// Note: Our basic case have no material features, and is call standard. Thus why there is nothing here
/* 1 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL,
/* 2 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA,
/* 3 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV,
/* 4 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV,
/* 5 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE,
// SSS
/* 6 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_SSS,
/* 7 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_SSS,
/* 8 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SSS,
/* 9 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SSS,
/* 10 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_SSS,
// Standard with SSS and Transmission
/* 6 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_SUBSURFACE_SCATTERING | MATERIALFEATUREFLAGS_LIT_TRANSMI SSION ,
/* 7 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_SUBSURFACE_SCATTERING | MATERIALFEATUREFLAGS_LIT_TRANSMI SSION ,
/* 8 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SUBSURFACE_SCATTERING | MATERIALFEATUREFLAGS_LIT_TRANSMI SSION ,
/* 9 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SUBSURFACE_SCATTERING | MATERIALFEATUREFLAGS_LIT_TRANSMI SSION ,
/* 10 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_SUBSURFACE_SCATTERING | MATERIALFEATUREFLAGS_LIT_TRANSMI SSION ,
// Aniso
/* 11 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_ANISO,
/* 12 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_ANISO,
/* 13 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_ANISO,
/* 14 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_ANISO,
/* 15 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_ANISO,
// Anisotropy
/* 11 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_ANISOTROPY ,
/* 12 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_ANISOTROPY ,
/* 13 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_ANISOTROPY ,
/* 14 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_ANISOTROPY ,
/* 15 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_ANISOTROPY ,
// With foliage or crowd with SSS and standard can overlap a lot, better to have a dedicated combination
/* 16 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_SSS | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 17 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_SSS | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 18 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SSS | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 19 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_SSS | MATERIALFEATUREFLAGS_LIT_STANDARD ,
/* 20 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_SSS | MATERIALFEATUREFLAGS_LIT_STANDARD ,
// Standard with clear coat
/* 16 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT ,
/* 17 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT ,
/* 18 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT ,
/* 19 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT ,
/* 20 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT ,
// ClearCoat
/* 21 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT,
/* 22 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT,
/* 23 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT,
/* 24 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT,
/* 25 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_CLEAR_COAT,
// Standard with clear coat and Iridescence
/* 21 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_IRIDESCENCE | MATERIALFEATUREFLAGS_LIT_ CLEAR_COAT,
/* 22 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_AREA | MATERIALFEATUREFLAGS_LIT_IRIDESCENCE | MATERIALFEATUREFLAGS_LIT_ CLEAR_COAT,
/* 23 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_IRIDESCENCE | MATERIALFEATUREFLAGS_LIT_ CLEAR_COAT,
/* 24 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | LIGHTFEATUREFLAGS_ENV | MATERIALFEATUREFLAGS_LIT_IRIDESCENCE | MATERIALFEATUREFLAGS_LIT_ CLEAR_COAT,
/* 25 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIALFEATUREFLAGS_LIT_IRIDESCENCE | MATERIALFEATUREFLAGS_LIT_ CLEAR_COAT,
/* 26 */ LIGHT_FEATURE_MASK_FLAGS_OPAQUE | MATERIAL_FEATURE_MASK_FLAGS, // Catch all case with MATERIAL_FEATURE_MASK_FLAGS is needed in case we disable material classification
};