RRS camera that filters out everything except for the player

[thorn saddle]

I have seen in many games such as jujutsu kaisen or untitled background where when I use a certain ability it will show the player on your screen but doesn't show the background only the player

[dense sable]

(this is off the top of my head)
I think you can just mess with the camera's settings to show only the player and then make the material transparent. (I could be wrong though lol)

[thorn saddle]

Now I know I am extremely late on this and it was just a guess on how to do it but I'm just now testing it out but when you said change the material, what do you want me to change the material of?