A 2×2×2 identity LUT (output = input). Bound by default so the tonemap pass always has a valid 3D texture even when no user LUT is set; the grade shader gates actual sampling behind the LUT-enable flag.
A 2×2×2 identity LUT (output = input). Bound by default so the tonemap pass always has a valid 3D texture even when no user LUT is set; the grade shader gates actual sampling behind the LUT-enable flag.