Shoulder Warping/Twisting

[HerrDave]

I'm having tremendous problems attaching the arm of my zombie to the torso.
T-Virus Zombies

The problem I'm encountering is, every time I attach the arm, the shoulder warps in animations requiring the arm to be extended forwards.

One person suggested I use the same trick WoW uses, but I can't work out how they got their model to not stretch/warp, because even with that method the shoulder deforms like a piece of clippy-lego.

Could somebody give me a hand with this?

 

[The_Silent]

Adding some bones to those surrounding verticies and animating them is probably the solution that will end up looking the best.

 

[PROXY]

Or adding more polygons should reduce the stretching too.

Hidden

This sketch is in no way accurate but I guess you know what I mean. After you've extended the mesh, these "in-between-polies" should be attached both to the arm bone as well as the chest bone to give it a smooth transition.

 

[HerrDave]

I might end up adding an extra bone on the shoulder that rotates only the connecting polygons to reduce the stretching

I literally stood in front of a mirror with my sleeves rolled up trying to work out how to bend the arm without warping and I only succeeded in waving my arms around for 5 minutes

*Edit

Oh God, it's getting worse! D: