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I am currently trying to let someone print a 3D-model of mine for school. The model was made in blender.

Everything works fine until the guy imports my model via .stl for printing.

Suddenly the model has got holes on its left leg. What is wrong? I can not find a solution.

enter image description here

0scar
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LaSo
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    There is a problem, with your `stl` file, it most probably has some inverted normals. This is quite a common problem with Blender generated files, look into this [topic](https://3dprinting.stackexchange.com/q/15868/). – 0scar Jan 03 '22 at 18:09
  • There is also a dedicated Blender SE site at https://blender.stackexchange.com/ that may be worth searching. – Criggie Jan 05 '22 at 03:36
  • Hopefully, Trish's link specific to Blender will fix the problem. In general drawings have issues when surfaces have the inner and outer sides of the surface assigned in reverse. Extra surfaces inside the solid can also cause a problem. These surfaces need to be deleted. – Perry Webb Jan 04 '22 at 20:20

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