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/split/kernel_subsurface_scatter.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/split/kernel_subsurface_scatter.h')
| -rw-r--r-- | intern/cycles/kernel/split/kernel_subsurface_scatter.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/intern/cycles/kernel/split/kernel_subsurface_scatter.h b/intern/cycles/kernel/split/kernel_subsurface_scatter.h index 6caa18518dd..3b957856aea 100644 --- a/intern/cycles/kernel/split/kernel_subsurface_scatter.h +++ b/intern/cycles/kernel/split/kernel_subsurface_scatter.h @@ -250,16 +250,17 @@ ccl_device void kernel_subsurface_scatter(KernelGlobals *kg) #ifdef __BRANCHED_PATH__ } else if(IS_FLAG(ray_state, ray_index, RAY_BRANCHED_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) { uint lcg_state = lcg_state_init_addrspace(state, 0x68bc21eb); - float bssrdf_u, bssrdf_v; - path_state_rng_2D(kg, - state, - PRNG_BSDF_U, - &bssrdf_u, &bssrdf_v); subsurface_scatter_step(kg, sd, state, |