Is that for SkeletalMeshes only? We use special Invicible material that is transparent, do not use fog or depth test, disables basically everything that you can. Then it set sqrt(-1) to world position offset. This generates static NAN to vertex position and compiler optimize vertex shader to empty and those vertices does not produce any pixels so pixel shader cost is also zero. This shader does not even load model vertices because they are not used. It’s not totally free. CPU cost is there because draw call is emitted but GPU cost is almost or even totally zero.