Replace shaders + Single pass stereo + scene mesh using screen coords

I have to do some offscreen render textures. These render textures are then used by scene objects later. Everything was fun until I looked to the HMD screen Image may be NSFW.
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For simplicity, I have built a refractive shader with shaderforge. Then, I made some modifications to make it work in SPSR.

This is the result (its looking correct in vr and editor):
Replace shaders + Single pass stereo + scene mesh using screen coords