diff options
| author | Brecht Van Lommel <brechtvanlommel@gmail.com> | 2017-09-14 23:56:32 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brechtvanlommel@gmail.com> | 2017-09-20 20:38:08 +0300 |
| commit | 095a01a73a35d3af57573fc724d381bcca019f54 (patch) | |
| tree | 3f22c746d1e9ae75365ade400ca08e0ae255788e /intern/cycles/kernel/kernel_path_subsurface.h | |
| parent | b3afc8917cdeaa98ebfa3f2aa17e8c5a69fdb1e3 (diff) | |
Cycles: slightly improve BSDF sample stratification for path tracing.
Similar to what we did for area lights previously, this should help
preserve stratification when using multiple BSDFs in theory. Improvements
are not easily noticeable in practice though, because the number of BSDFs
is usually low. Still nice to eliminate one sampling dimension.
Diffstat (limited to 'intern/cycles/kernel/kernel_path_subsurface.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_path_subsurface.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/intern/cycles/kernel/kernel_path_subsurface.h b/intern/cycles/kernel/kernel_path_subsurface.h index cc6231eb6b1..1753618607a 100644 --- a/intern/cycles/kernel/kernel_path_subsurface.h +++ b/intern/cycles/kernel/kernel_path_subsurface.h @@ -32,7 +32,10 @@ bool kernel_path_subsurface_scatter( ccl_addr_space float3 *throughput, ccl_addr_space SubsurfaceIndirectRays *ss_indirect) { - const ShaderClosure *sc = shader_bssrdf_pick(sd, throughput); + float bssrdf_u, bssrdf_v; + path_state_rng_2D(kg, state, PRNG_BSDF_U, &bssrdf_u, &bssrdf_v); + + const ShaderClosure *sc = shader_bssrdf_pick(sd, throughput, &bssrdf_u); /* do bssrdf scatter step if we picked a bssrdf closure */ if(sc) { @@ -45,8 +48,6 @@ bool kernel_path_subsurface_scatter( uint lcg_state = lcg_state_init_addrspace(state, 0x68bc21eb); SubsurfaceIntersection ss_isect; - float bssrdf_u, bssrdf_v; - path_state_rng_2D(kg, state, PRNG_BSDF_U, &bssrdf_u, &bssrdf_v); int num_hits = subsurface_scatter_multi_intersect(kg, &ss_isect, sd, |