diff options
Diffstat (limited to 'modules/lightmapper_rd/lm_compute.glsl')
| -rw-r--r-- | modules/lightmapper_rd/lm_compute.glsl | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/modules/lightmapper_rd/lm_compute.glsl b/modules/lightmapper_rd/lm_compute.glsl index 8968ff0b57..88fc316679 100644 --- a/modules/lightmapper_rd/lm_compute.glsl +++ b/modules/lightmapper_rd/lm_compute.glsl @@ -649,15 +649,20 @@ void main() { light_for_texture += light; #ifdef USE_SH_LIGHTMAPS + // These coefficients include the factored out SH evaluation, diffuse convolution, and final application, as well as the BRDF 1/PI and the spherical monte carlo factor. + // LO: 1/(2*sqrtPI) * 1/(2*sqrtPI) * PI * PI * 1/PI = 0.25 + // L1: sqrt(3/(4*pi)) * sqrt(3/(4*pi)) * (PI*2/3) * (2 * PI) * 1/PI = 1.0 + // Note: This only works because we aren't scaling, rotating, or combing harmonics, we are just directing applying them in the shader. + float c[4] = float[]( - 0.282095, //l0 - 0.488603 * light_dir.y, //l1n1 - 0.488603 * light_dir.z, //l1n0 - 0.488603 * light_dir.x //l1p1 + 0.25, //l0 + light_dir.y, //l1n1 + light_dir.z, //l1n0 + light_dir.x //l1p1 ); for (uint j = 0; j < 4; j++) { - sh_accum[j].rgb += light * c[j] * 8.0; + sh_accum[j].rgb += light * c[j] * bake_params.exposure_normalization; } #endif } @@ -710,15 +715,20 @@ void main() { vec3 light = trace_indirect_light(position, ray_dir, noise, texel_size_world_space); #ifdef USE_SH_LIGHTMAPS + // These coefficients include the factored out SH evaluation, diffuse convolution, and final application, as well as the BRDF 1/PI and the spherical monte carlo factor. + // LO: 1/(2*sqrtPI) * 1/(2*sqrtPI) * PI * PI * 1/PI = 0.25 + // L1: sqrt(3/(4*pi)) * sqrt(3/(4*pi)) * (PI*2/3) * (2 * PI) * 1/PI = 1.0 + // Note: This only works because we aren't scaling, rotating, or combing harmonics, we are just directing applying them in the shader. + float c[4] = float[]( - 0.282095, //l0 - 0.488603 * ray_dir.y, //l1n1 - 0.488603 * ray_dir.z, //l1n0 - 0.488603 * ray_dir.x //l1p1 + 0.25, //l0 + ray_dir.y, //l1n1 + ray_dir.z, //l1n0 + ray_dir.x //l1p1 ); for (uint j = 0; j < 4; j++) { - sh_accum[j].rgb += light * c[j] * 8.0; + sh_accum[j].rgb += light * c[j]; } #else light_accum += light; |