Mirrors/Reflectance

  1. What do you want to achieve?

I would like to achieve an effect similar to mirrors or anything with a reflectance for a character customization place/game map. Think of mirrors within the Hitman trilogy of games, and how they reflect the world around Agent 47.

  1. What is the issue?
    I have reached a roadblock, I have made a mirror functional, which is what I wished to accomplish. The issue is that is produces a large amount of lag when it functions, and that’s with just one mirror in a small room.

The tutorial I used is linked here.
How to Make a MIRROR in ROBLOX! - YouTube

Is there any way to possibly optimize the following video, or an obscure way that I could have done this? Thanks in advance.