Mech Fingers mesh folds into itself I'm having a problem with the hands with the Rigify generated rig(using the deformation rig) as this is a mecha robot, the fingers are clipping into itself too much. I tried fixing the vertex groups on the hands and nothing. As I can't seem to find any answer for this, is there a way I can have more mechanical fingers that won't deform as much like that of a human finger would with Rigify rig?
If you reparent With Automatic Weight it will works rather fine, so the solution may be to make hands separate objects, parent With Automatic Weight, then if necessary join back to the rest:

If you don't want to reparent With Automatic Weight for some reasons, then you need to give some manual corrections in order to extend a bit the influence of each bone. First thing, display the layers with the bones that deform your mesh and the ones that command:

You need then to extend a bit the influence of each phalanx, before:

After:

It will work better:

Use the Paint Mask option to make it easier to paint on the right faces, also make sure that you enable all the options that allow to paint through (in the N panel):

You can also do all the corrections through the Vertex Groups list and Assign button, which may be quicker: