RTS fog of war texture remapping shader,Fog of war plane texture remapping shader HDRP

I have a render texture which is rendered by top-down orthographic camera. It's in greyscale and white represents visible areas, and black represents hidden. I have a plane over my terrain which i'm planning to use as fog - white visible parts are fully transparent, and black is semi-transparent(hidden from view). I need to write shader which will remap texture to the camera point of view. Right now it is rendering without camera awareness.

On the screenshot you can see that visible part don't match camera angle