SpriteDropShadow shader issue when rotating sprite #34

This shader works like a charm!! The only thing that looks weird is when I rotate a sprite, then the direction of the shadow is wrong, is there a way to incorporate this into the shader so that the shadow is always in the same direction?

from
https://forum.unity.com/threads/drop-shadow-shader-for-sprites.449123/#post-4737314

cc @smkplus