1 files changed, 8 insertions, 1 deletions
diff --git a/intern/cycles/kernel/light/sample.h b/intern/cycles/kernel/light/sample.h
index 5a4b7c0a302..7dbc783b1bb 100644
--- a/intern/cycles/kernel/light/sample.h
+++ b/intern/cycles/kernel/light/sample.h
@@ -141,7 +141,14 @@ ccl_device_inline float3 shadow_ray_smooth_surface_offset(
     KernelGlobals kg, ccl_private const ShaderData *ccl_restrict sd, float3 Ng)
 {
   float3 V[3], N[3];
-  triangle_vertices_and_normals(kg, sd->prim, V, N);
+
+  if (sd->type == PRIMITIVE_MOTION_TRIANGLE) {
+    motion_triangle_vertices_and_normals(kg, sd->object, sd->prim, sd->time, V, N);
+  }
+  else {
+    kernel_assert(sd->type == PRIMITIVE_TRIANGLE);
+    triangle_vertices_and_normals(kg, sd->prim, V, N);
+  }
 
   const float u = sd->u, v = sd->v;
   const float w = 1 - u - v;