To add to this idea, I would envision if as a domain tool. Something like a trigger where placed inside the domain object would have symmetry while building it you could grab either the root object or the cloned copy and they would effect each other. Then once complete you would "solidify" your choices in the tools property panel, which would collapse the domain and make all cloned objects real.

It would be nice to be able to create mirrors. I'd like to create fancy mirror art pieces. I'd like to be able to see my avatar's reflection in worlds. ( Different from the "Mirror Tool" idea because that would help in creating things.) I'd like to be able to look in the mirror in my worlds.

More shapes would be awesome.

Mirrors! the ability to have a mirror just like the one in your person space to put into your worlds I would love to see mirrors with a customization button and some without.

I would like to be able to make a mirror so you can see your avatar in a world

Ability to place a mirror in your world, similar to the one in the personal space. Imagine:

- Trying on outfits
- Talking to livestream/recording
- Seeing yourself with friends
- Etc.

I guess negative scaling? Not sure if codeblocks allows it.