Besides the thumb, as you've saidl; The palm. In that view it should rise from the thumb, where as it looks hill-like in that picture.
Also, the joints where the hands are connecting to the fingers and thumb looks odd. Looking as though it's more of a glove then a hand.
But, as it's a robotic hand, i guess it works well with it.
I found corel difficult.
Could never grasp it properly..
Anyway, Good work.
