# Belly deforming when moving hand!

For some reason moving the hand deforms the belly:

However, there are no weights in that area, or at least none strong enough to cause the deformation I see:

This is how it appears normally (at rest position):

How would I go about fixing this? I am completely stumped.

• – Paul Gonet Oct 7 '17 at 1:18
• @PaulGonet Doesn't work, weights are already cleared, yet it still deforms like this. – Yoshimaster Oct 7 '17 at 1:21
• Uploading a .blend file would definitely help. – Scott Milner Oct 7 '17 at 2:16
• It's always weights... always. Hard to spot, yes. – m.ardito Oct 7 '17 at 7:40
• @ScottMilner Added the .blend file. – Yoshimaster Oct 7 '17 at 14:09

Diagnosis first, solution second:

# Problem

From the looks of it you used automatic weigthing (probably heat-based) and in the bind pose the IK bone finger1.L.IK is very close to both the belly and the finger, so both places are automatically weigthed to the IK bone. Anything you move that moves the IK bone will therefor will move the belly. This problem exists for all of your IK bones, they all have weights when they really should not deform anything, they are just helpers to move the real deform bones like finger1.L, finger1.L.001.

# Solution

Your IK targets generally should not have any vertices weigthed to them if you only want to use them to drive your real deform bones. To make sure automatic weighting doesn't use helper bones, select them and switch off the deform option by clicking Armature>Bone Settings>Deform in the 3d View menu bar or by pressing SHIFTW and selecting deform (just unchecking the checkbox only changes the setting for the currently selected bone!):

Notice that I did not switch deform off for the IK targets of the feet, because you are using those as both an IK target and deform bones for the feet!

When you are done with this you have to redo the weigths. Select the mesh ALTP then select Clear Parent and finally you can parent the mesh to the armature again like you did before and create automatic weigths again. I've attached my result as a .blend file, so you can have a look if you have any further problems.