I like mirror planes, they're brilliant, I'd like some more please Image may be NSFW.
Clik here to view.
I don't want to compare this to SE, but hell, I can't not really, so here's a small wishlist of things that it does, that I and my massive CV building brother would really really find handy:
1) multiple simultaneous mirror planes, oh, you want XY AND YZ? oh yeah baby.
2) mirror planes aligned to the edges of blocks, so you can do even blockcount mirrored builds
3) painting/texturing should also obey mirror planes.
There's...
Mirror Planes and stuff.
Clik here to view.

I don't want to compare this to SE, but hell, I can't not really, so here's a small wishlist of things that it does, that I and my massive CV building brother would really really find handy:
1) multiple simultaneous mirror planes, oh, you want XY AND YZ? oh yeah baby.
2) mirror planes aligned to the edges of blocks, so you can do even blockcount mirrored builds
3) painting/texturing should also obey mirror planes.
There's...
Mirror Planes and stuff.