That's my attempt at a mirror. I have a feeling I missed a node or setting somewhere, but since the lighting is so dim I am not sure what would be the best settings. I am pretty darn happy with this though. I made neon!! :) I kept tinkering with the roughness to make it more black on the mirror. Tips? I was trying to do a reflection plane originally, but it didn't reflect lol. I wasn't sure why. So I just made a plane and tweaked the materials. Do you have to have the reflection cubemap for a reflection plane to work? I wasn't sure.