The green mesh and the blue mesh are identical except the green one started out as a 3mm diameter cylinder and the blue one started out as a 6.5mm diameter cylinder.

I hate to say it this way because I've been making a lot of changes as I go along so it's not 100% true but basically use of the boolean modifier has been pretty much hit and miss. Every time I use it I have no idea if it will work or not.

Once I get the blue mesh to carve into any spot on the red mesh I have to get it to carve over where the green mesh has already carved and I'm certain that will be more difficult.

Here's what I'm having trouble with: enter image description here enter image description here

and this is the general idea of how the blue and green meshes fit into the red mesh:

enter image description here

It's from an earlier model before I was as good with blender as I am now, lol. It basically forms one of those interlocking tracks that are used to hold parts together.

Finally, here is a stripped down version of the file that contains only the three meshes in question. Thanks in advance.

  • $\begingroup$ Well, for what it's worth I got it. I just recreated the blue mesh and tried again (i.imgur.com/x4i07Sq.png). If I had to guess I'd say maybe I added a solidify to the blue mesh and forgot about it and that messed things up somehow. I really don't know why the blue mesh doesn't work but recreating it worked. $\endgroup$
    – user875234
    Aug 1, 2019 at 19:10


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