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Here we have two overlapping cylinders:

enter image description here

They could be one mesh or two separate meshes. I don't care.

What I would like to get blender to do is remove the interior faces.

enter image description here

I'm having several problems.

  1. Select > interior faces doesn't do anything
  2. Many "answers" to this question tell you to press select while in edit mode but in 2.8 that's how you tell blender to start animating.
  3. Boolean (Intersect|Union|Difference) (assuming the cylinders are two separate meshes, of course) doesn't work and it often generates strange geometry. How you get this out of two circles is beyond me. In the image both cylinders have the same height but usually I have to make one cylinder taller so that it's above and below the other cylinder to get it to work.

enter image description here

Am I making a reasonable request here? For more context, this is the mesh that I would like to clean up the interior of.

enter image description here

The cylinders are just because I've given up doing this with more complicated meshes. How can I remove as many of the vertices/faces from the inside of this mesh as possible? Thank you.

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You're making it very complicated, there are several ways to make your object, the simplest would be to bevel the angles of a rectangle. Then you may need to work the topology but it depends on your final goal.

enter image description here

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  • $\begingroup$ How did you do that? To me it looks like you added edge loops to the edges of the rectangle and deleted their line segments on the front and back faces. Then you just did bevel? Is that right? Were there any special settings you had to use on bevel? $\endgroup$ – user875234 Oct 6 at 12:59
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    $\begingroup$ I just select the 4 corner edges and bevel with ctrl B. It's a much easier solution than yours but you could as well fix your solution with some snap and vertices auto-merges. $\endgroup$ – moonboots Oct 6 at 14:00
  • $\begingroup$ When I select the 4 corner edges and ctrl+b it doesn't add any additional edges. e.g.i.imgur.com/MaUOJ1s.png. $\endgroup$ – Sean McHugh Oct 6 at 17:45
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    $\begingroup$ press "+" to add more edges, or play with the parameters (Segments) in the operator box (bottom left in 2.8) $\endgroup$ – moonboots Oct 6 at 17:52
  • $\begingroup$ *claps excitedly! That did it. Thanks! $\endgroup$ – Sean McHugh Oct 6 at 17:55

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