diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_tex_coord.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_tex_coord.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/intern/cycles/kernel/svm/svm_tex_coord.h b/intern/cycles/kernel/svm/svm_tex_coord.h index 27fed89fdf7..276b6f26f5e 100644 --- a/intern/cycles/kernel/svm/svm_tex_coord.h +++ b/intern/cycles/kernel/svm/svm_tex_coord.h @@ -312,7 +312,7 @@ ccl_device void svm_node_normal_map(KernelGlobals *kg, ShaderData *sd, float *st /* apply normal map */ float3 B = sign * cross(normal, tangent); - N = normalize(color.x * tangent + color.y * B + color.z * normal); + N = safe_normalize(color.x * tangent + color.y * B + color.z * normal); /* transform to world space */ object_normal_transform(kg, sd, &N); @@ -330,14 +330,18 @@ ccl_device void svm_node_normal_map(KernelGlobals *kg, ShaderData *sd, float *st if(space == NODE_NORMAL_MAP_OBJECT || space == NODE_NORMAL_MAP_BLENDER_OBJECT) object_normal_transform(kg, sd, &N); else - N = normalize(N); + N = safe_normalize(N); } float strength = stack_load_float(stack, strength_offset); if(strength != 1.0f) { strength = max(strength, 0.0f); - N = normalize(ccl_fetch(sd, N) + (N - ccl_fetch(sd, N))*strength); + N = safe_normalize(ccl_fetch(sd, N) + (N - ccl_fetch(sd, N))*strength); + } + + if(is_zero(N)) { + N = ccl_fetch(sd, N); } stack_store_float3(stack, normal_offset, N); |