Skin is weighting the wrong direction

[Anonymous]

This is my first post here so first of all I would like to say hi to everyone!

I am intermediate user of 3ds max when it comes to modelling but I am quiet new to rigging and animation. 

I have my 3 thumb bones and after applying skin modifier it does not affect skin very well, when I put the weight on the thumb vertices they go very offset.

I am attaching the video so you can clearly see what is happening.

https://youtu.be/rG0IlOePcbQ

Thx in advance!

[pepetd]

You probably manipulated the mesh or the bones after creating the skin modifier, you can easily fix this by checking and un-checking the "always deform" check box in the skin modifier.