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I am using Blender 2.7.8.

I have a lot of intersecting faces on a peice I am trying to 3D print. My usual strategy in Edit mode is to manually delete each face, select the verticies forming it, and reform the face using F. This is unreasonable at this point. I have tried to select them all, and do a boolean operation, but that doesn't work (Intersect deletes everything, Union gives no improvement with all the faces selected).

What else can I try? Is there anyway to identify the real problem interfaces? Pic below. (Sorry for the Blue tinge, idk why screenshots on my second monitor always do that, #linuxproblems)

enter image description here

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  • $\begingroup$ You can try removing doubles, or if, that's not enough, a software like NetFabb can be used to automatically correct non 3d-printer compatible meshes. $\endgroup$
    – Tritofic
    Jul 25, 2017 at 17:41

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I hacked around this by:

  1. Selecting all intersectng faces

  2. Deleting only faces

  3. Using Make Manifold

This reduced the number from 45 to 3, and I repeated the same strategy above on those 3 until there were 0.

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  • $\begingroup$ Be careful doing this. Since you're deleting faces, Make Manifold will just fill any holes that are left without regard to the overall shape of the model. $\endgroup$
    – Geuis
    Mar 31, 2022 at 11:59
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Sometimes I size X, Y or Z minutely and this can clear intersecting faces, this has worked on several of my models.

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There is this plugin specifically for Blender that helps with correcting these types of errors. https://makeprintable.com/plugins

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