From 90d4b823d72922922bb3d0af48ec2f592d210cdd Mon Sep 17 00:00:00 2001 From: Brecht Van Lommel Date: Wed, 13 Sep 2017 18:28:31 +0200 Subject: Cycles: use defensive sampling for picking BSDFs and BSSRDFs. For the first bounce we now give each BSDF or BSSRDF a minimum sample weight, which helps reduce noise for a typical case where you have a glossy BSDF with a small weight due to Fresnel, but not necessarily small contribution relative to a diffuse or transmission BSDF below. We can probably find a better heuristic that also enables this on further bounces, for example when looking through a perfect mirror, but I wasn't able to find a robust one so far. --- intern/cycles/kernel/split/kernel_shader_eval.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'intern/cycles/kernel/split') diff --git a/intern/cycles/kernel/split/kernel_shader_eval.h b/intern/cycles/kernel/split/kernel_shader_eval.h index c792c4adb0e..7032461b04a 100644 --- a/intern/cycles/kernel/split/kernel_shader_eval.h +++ b/intern/cycles/kernel/split/kernel_shader_eval.h @@ -52,8 +52,14 @@ ccl_device void kernel_shader_eval(KernelGlobals *kg) shader_eval_surface(kg, &kernel_split_state.sd[ray_index], state, state->flag); #ifdef __BRANCHED_PATH__ - shader_merge_closures(&kernel_split_state.sd[ray_index]); -#endif /* __BRANCHED_PATH__ */ + if(kernel_data.integrator.branched) { + shader_merge_closures(&kernel_split_state.sd[ray_index]); + } + else +#endif + { + shader_prepare_closures(&kernel_split_state.sd[ray_index], state); + } } } -- cgit v1.2.3