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So, I recently got into Blender and so far I'm having a lot of fun, even though it's really, really complicated. I've stumbled upon a few problems so far but most of them I have been able to solve. Expect for this one.

I'm testing my skills by trying to make a human, and right now I'm learning how to rig. I created the arm bones so far, but theres only one weird problem that I'm having. When I move the lower part of the arm, The whole human freaks out, as seen below:

Image 1

Now first I though this had to do with the weight map, but after painting the body like this;

Image 2

I still get a result that looks close to the previous image. As you can also see in the previous image is that it looks like as if the body exists of 2 inside each other (One part of the stomach stays still, the other one moves). However, when I look in edit mode there are no double edges, so im quite confused.

Does anyone know what causes this? Any help is much appreciated!

My .blend file can be found here:

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    $\begingroup$ At the least I can see a bit of weight (green) on the lower body - so I'd assume the bone is influencing other areas as well. Also I doubt the bone should be influencing the other arm as well $\endgroup$ – UnholySheep Mar 15 '17 at 15:27
  • $\begingroup$ Could you upload your .blend file on blend-exchange.giantcowfilms.com to be able to help you? $\endgroup$ – Tak Mar 15 '17 at 23:40
  • $\begingroup$ @Tak Here you go: <img src="https://blend-exchange.giantcowfilms.com/embedImage.png?bid=2943" />I managed to fix part of the problem by selecting 'limit selection to visible' in weight paint, but when you open the file you'll see that even though most of the body is blue, some parts still move. Also, I discovered that all vertices somehow doubled? So there's two on every position, not sure how I managed to do that though... I was so proud of how my human turned out at first, but it seems like I messed up after all... $\endgroup$ – ISOREX Mar 16 '17 at 12:26
  • $\begingroup$ @ISOREX answer provided with screenshots and an updated .blend file. Don't forget to accept the answer if it solved your problem. $\endgroup$ – Tak Mar 16 '17 at 23:48
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This happens because couple of the vertices has very small weighting to the bones. So avoid this you need to select your mesh, then enter edit mode then select these vertices and set the weighting to 0 for the two bones as shown below:

enter image description here enter image description here

This will fix the problem as shown below:

enter image description here

Updated .blend file can be found here:

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