diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_closure.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_closure.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/intern/cycles/kernel/svm/svm_closure.h b/intern/cycles/kernel/svm/svm_closure.h index caae65487c4..fe3fe697bca 100644 --- a/intern/cycles/kernel/svm/svm_closure.h +++ b/intern/cycles/kernel/svm/svm_closure.h @@ -336,8 +336,14 @@ ccl_device void svm_node_closure_bsdf(KernelGlobals *kg, ShaderData *sd, float * if(sd->flag & SD_BACKFACING && sd->type & PRIMITIVE_ALL_CURVE) { ShaderClosure *sc = svm_node_closure_get_bsdf(sd, mix_weight); + if(sc) { - sc->weight = make_float3(1.0f,1.0f,1.0f); + /* todo: giving a fixed weight here will cause issues when + * mixing multiple BSDFS. energey will not be conserved and + * the throughput can blow up after multiple bounces. we + * better figure out a way to skip backfaces from rays + * spawned by transmission from the front */ + sc->weight = make_float3(1.0f, 1.0f, 1.0f); sc->N = N; sd->flag |= bsdf_transparent_setup(sc); } |