Is it possible to stack these two identical islands using some tool, instead of doing it per vertex and eyeballing it?

Also is there a way to only UV half a model and mirror the UVs to the other half without having to delete half the model and then do symmetrize polygons?

Thanks.

About mirror I don't know. But the planar projection is a very useful tool.

MileHighGuy wrote:Is it possible to stack these two identical islands using some tool, instead of doing it per vertex and eyeballing it?

Move one polygon island over the other and press ctrl+M to use the Match tool and adjust the tolerance as needed.

Thanks guys!