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Timeline for Separate a part without holes

Current License: CC BY-SA 4.0

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Oct 27, 2020 at 11:07 comment added batFINGER Like a non axis aligned version of this.blender.stackexchange.com/a/133136/15543 Could use a plane mesh as a proxy for the cutting plane.
Oct 27, 2020 at 10:55 comment added jachym michal @lemon That's a good point, I might've missed that part :)
Oct 27, 2020 at 10:48 comment added lemon I'm wondering if it is what he/she wants, as " I select all the vertices and I click on "separate"."... so the separation is based on existing vertices (?).
Oct 27, 2020 at 10:03 comment added Robin Betts I suppose there's always Bisect with fill, but it's infuriating, trying to make both halves.
Oct 27, 2020 at 9:43 comment added jachym michal Sure, that way no geometry is removed. But unless you worry about losing 0,001mm of geometry, there's no need. If the plane has at least some thickness, it reliably fills both parts (since it's a standard boolean) :).
Oct 27, 2020 at 9:38 comment added Robin Betts I guess, to be sure, you can do it in 2 subtractions, solidifying the plane in different directions for each.
Oct 27, 2020 at 9:28 history edited jachym michal CC BY-SA 4.0
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Oct 27, 2020 at 9:27 comment added jachym michal I just found it doesn't always fill both holes :). It works reliably when the plane has 0.001 mm thickness though. I'll edit the answer.
Oct 27, 2020 at 9:23 comment added Robin Betts Wow! That's really useful, and makes no sense at all! (Shows how little I use Booleans) .. and Intersect does the other side? Flipping normals doesn't seem to make any difference to the direction?
Oct 27, 2020 at 8:55 history edited jachym michal CC BY-SA 4.0
added 11 characters in body
Oct 27, 2020 at 8:43 history answered jachym michal CC BY-SA 4.0