Picking on backfaces doesn't work

[EgonOlsen]

A software needs to have bugs to be cool. So i'm posting about this one myself to fill this section with life.
It's simple: If you disable backface-culling for an Object3D and try to use the picking methods from Interact2D, backfaces (polygons that would have been culled with backface culling enabled) can't be picked. This will be fixed someday, but it's quite low on my priority list.