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So I got a problem. I recently started with Blender and I created this low poly character. I already rigged her and moving the bones works good. Now I wanted to do some weight painting to prevent certain bones to move certain parts of the mesh. The problem is that I cant use weight paint properly.

So here is my mesh with weight paint. You can see that when I select the bone the automatic weight paint works just fine. enter image description here

enter image description here

On the second image though you can see the only part i can actually paint. Its only this specific part of the head, thats it. Someone ever had this problem and knows a fix for this?

Thanks for your attention!

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  • $\begingroup$ Have you perhaps locked some weights? $\endgroup$ – Leander Nov 24 '19 at 19:49
  • $\begingroup$ I didn't lock anything as far as I know but there is a great chance that I did that by accident. I definitely look into that tomorrow/later. I update it once I tried. Thanks for the reply :) $\endgroup$ – Luke Krieg Nov 24 '19 at 21:45
  • $\begingroup$ Just in case: blender.stackexchange.com/q/72358/30849 $\endgroup$ – Leander Nov 24 '19 at 21:45
  • $\begingroup$ @Leander I followed the short tutorial you send me but they are all unlocked. When I lock them then of course no paint can be applied. But when unlocking all only the same part of the head can be painted. I tried different Models and I got the same problem on every model I create. For example I created a Sphere in a new file and directly head to Weight paint. There I can also just paint one paticular area. I think I got a problem with the settings maybe? Or what else do I need before weight painting? $\endgroup$ – Luke Krieg Nov 25 '19 at 14:57
  • $\begingroup$ Ok I found out some new weird stuff. So I changed the screen lay-out to "compositing" ( it works in others aswell), and there it actually worked on the right side of the model ( only the right side). Maybe someone can use this information better than I can... $\endgroup$ – Luke Krieg Nov 25 '19 at 17:49
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The problem is in your Mesh. Go to edit mode, select all Polygones an then click ALT+N and chose recaculate outside.

That is because the Polygon have 2 sides. Front and Backside. You cant paint on the backside of the Polygon

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