[DustyPorViva]

The background is using images for the edges, and a poly for the body. So if the edges aren't showing it might be an image bug with the Mac client.
I certainly don't want to show it with a mouseover as there really shouldn't be a need to use your mouse.

As for movement... this is something I pondered. The stuff that's hiding is really only vital while fighting and such, so it shows when you press either A/S/D. I didn't really find a reason to show it while moving.