Turn the wrist to show a raised and lowered position of the hand.
For the moment we deal only with the adjustment of the vertexes of the wrist and we leave the remainder of the vertexes influenced by the Main bone just as they are.
Adjustment of a Finger.
For this it is necessary to make 3 frames each time an inflection is used.
Adjust in each frame the weights vertexes.
This principle is valid for the 3 other fingers, annular, major and index.
The skinning of the 4 finished fingers.
Aspect of the influence of the Hand bone once all fingers are skinned.
With the thumb now with 4 frames for 4 orientations of the phalanges.
Zones of respective influences of the three bones of the thumb.
It is illusionary with so few bones to remake a perfectly moving hand but it is an acceptable approach.