diff options
Diffstat (limited to 'intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h')
| -rw-r--r-- | intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h b/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h index 6a5d0410e01..ad7864cb8ea 100644 --- a/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h +++ b/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h @@ -77,7 +77,7 @@ ccl_device float3 bsdf_ashikhmin_shirley_eval_reflect(const ShaderClosure *sc, c NdotI = fmaxf(NdotI, 1e-6f); NdotO = fmaxf(NdotO, 1e-6f); float3 H = normalize(omega_in + I); - float HdotI = fmaxf(dot(H, I), 1e-6f); + float HdotI = fmaxf(fabsf(dot(H, I)), 1e-6f); float HdotN = fmaxf(dot(H, N), 1e-6f); float pump = 1.0f / fmaxf(1e-6f, (HdotI*fmaxf(NdotO, NdotI))); /* pump from original paper (first derivative disc., but cancels the HdotI in the pdf nicely) */ |