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Diffstat (limited to 'intern/cycles/kernel/geom/geom_motion_triangle.h')
| -rw-r--r-- | intern/cycles/kernel/geom/geom_motion_triangle.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/intern/cycles/kernel/geom/geom_motion_triangle.h b/intern/cycles/kernel/geom/geom_motion_triangle.h index 5ab0b731bdd..7409aa0d014 100644 --- a/intern/cycles/kernel/geom/geom_motion_triangle.h +++ b/intern/cycles/kernel/geom/geom_motion_triangle.h @@ -272,7 +272,11 @@ ccl_device_noinline void motion_triangle_shader_setup(KernelGlobals *kg, ShaderD #endif /* compute face normal */ - float3 Ng = normalize(cross(verts[1] - verts[0], verts[2] - verts[0])); + float3 Ng; + if(sd->flag & SD_NEGATIVE_SCALE_APPLIED) + Ng = normalize(cross(verts[2] - verts[0], verts[1] - verts[0])); + else + Ng = normalize(cross(verts[1] - verts[0], verts[2] - verts[0])); sd->Ng = Ng; sd->N = Ng; |