the thumb does rotate at the base but doesn't rotate into the correct position so produces an even more ugly bend. and I know the thumb doesn't twist at the joint but surely the bend at the base of the thumb should produce a position where the pad of the thumb is nearly opposite the pads of the fingers instead of at 90 degrees as in the pic. oh and I think the fingers in the pic are not positioned correctly, give it a try.

Getting old and still making "art" without soiling myself, now that's success.