Low-res game in unity

I would like to create an old fashioned game and I would like my game to see pixelated and I used this tutorial here to do it: Low Res Pixelated Rendering In Unity (Tutorial) - YouTube

It works but the problem is that the raycast is completely broken.

Try using a second camera for your Raycast as well. Configure cameras in the following way (important points are highlighted):

And use a second camera for functions like ScreenPointToRay().

In addition, there will be no permanent inscription “Display 1 No cameras rendering”.