// Area light textures
TEXTURE2D_ARRAY(_LtcData); // We pack all Ltc data inside one texture array to limit the number of resource used

#define LTC_GGX_MATRIX_INDEX 0 // RGBA
#define LTC_DISNEY_DIFFUSE_MATRIX_INDEX 1 // RGBA

#define LTC_LUT_SIZE   64
#define LTC_LUT_SCALE  ((LTC_LUT_SIZE - 1) * rcp(LTC_LUT_SIZE))
#define LTC_LUT_OFFSET (0.5 * rcp(LTC_LUT_SIZE))