 @@{ispc
 rtcOccluded1Ex(EXPR scene,EXPR context,EXPR ray);
 =>
-rtcOccluded(scene,context,&ray);
+rtcOccludedV(scene,context,&ray);
 COMMENT FIXME: ray is occluded when ray.tfar < 0.0f
 }@@
 

{
  uniform RTCIntersectContext context;
  rtcInitIntersectContext(&context);
  rtcIntersect(scene,&context,&query);
  query.hit.Ng_x = -query.hit.Ng_x;  // FIXME: only correct for triangles,quads, and subdivision surfaces
  query.hit.Ng_y = -query.hit.Ng_y;
  query.hit.Ng_z = -query.hit.Ng_z;

@@{ispc
rtcIntersectEx(EXPR scene,EXPR context,EXPR query);
=>
rtcIntersectV(scene,context,&query);
query.hit.Ng_x = -query.hit.Ng_x;  // FIXME: only correct for triangles,quads, and subdivision surfaces
query.hit.Ng_y = -query.hit.Ng_y;
query.hit.Ng_z = -query.hit.Ng_z;
