Thanks so much! And I indeed thought about it; but then I also thought "what if someone wants just a direct mirror". The only way I can get this done is like you said, with a doppelganger and color removing, but I had to completely rewrite the way the tint screen operated because the color of the wall would also change, so I rewrote it as a filter;
Anyway, the way its done and all through regions to determine texture & scattering, it'd be quite hard to have different reflections -also- have different heights AND refactions
however, I may have an idea :) If it works i'll post an update
Also ty <3