I'm trying to draw previous frame of animation on screen
you can see this effect here: https://youtu.be/WNL_KJNl6pU
Mortal Combat X (left) , Street Fighter Alpha 2 (right):
This effect also found in animation software and called onion skinning:
I've implemented this by spawning object every second but I think It is possible with shader.
I could make this effect by using RenderTexture for capturing previous frame , but I can't remove background color :(
I tried with Blending and grab pass but don't work(it was rendered normally)!!