Part of the Mesh goes missing I was modifying some of the weight paint for a hand model that I was getting ready for some simple hand animation gestures and when I started doing some of the animations I saw that there was a piece of my mesh missing. How do I fix this? Do I have to start all over? pictures and file below.



File here:

https://drive.google.com/file/d/0B5Q_BpDCNgg6cG9zM2UxeFlwcDQ/view?usp=sharing
I just post this to show some error in the weights. I downloaded your file and just reset the pose of all bones (ALT + R)

then selected bone.001:



this bone is not supposed to influence the hilighted area...

there are also many minor errors, maybe just 1 vertex here and there, quite subtle on various bones, but those also "move" your geometry in unexpected ways...