The 3D features of allium are actually pretty useful. I've been using them to be able to create 3d models so mechanical can do their magic with cases etc;
Most recent board has some more complex board cut outs and fold zones for flex, and allium really spits the dummy, the result is boards that don't fold.. Have raised a case with Altium and they adivse;
"this is a limitation of allium, it doesn't recognise the geometry of the board".. Sigh, if its good enough to be able to draw it!
I can produce the actuall working gerbers ok, but Im going to have to model the 3d bits as a separate process. and that is sort of non trivial!