I've seen a few websites offer this service. Taking your 2D photos and tuning them to 3D models to be engraved in crystal.
www.sub-laser.co.uk/shop/photo-gift/3D-Photo-Couple-Block-Large
More info:
www.sub-laser.co.uk/shop/support/index.php

Does anyone have any idea how they might be doing this? I find it hard to believe that they are individually modelling each and every photo they recieve. I work in the crystal imaging business and I've never seen any software that will turn 2D to 3D easily enough to be a viable and profitable service. I suspect they have some bit of software I'm not familiar with.

Anyone got any ideas as to what it might be?