Effects/HDR/bloom-threshold /sim/rendering/hdr/exposure-compensation /sim/rendering/hdr/bloom-threshold Shaders/HDR/trivial.vert Shaders/HDR/bloom-threshold.frag Shaders/HDR/exposure-include.frag hdr_tex sampler-2d 0 lum_tex sampler-2d 1 exposure_compensation float exposure-compensation bloom_threshold float bloom-threshold