topic Re: Separation line between slab and mesh not showing after boolean operation in Documentation

Separation line between slab and mesh not showing after boolean operation

alessiofazzi — Mon, 19 Jan 2026 11:27:41 GMT

I am facing this issue: Separation line between slab and mesh not showing after boolean operation, as shown on the attached image.

Any suggestion?

Thank you.

Alessio

Operating system used: Windows

Re: Separation line between slab and mesh not showing after boolean operation

Lingwisyer — Thu, 15 Jan 2026 08:14:22 GMT

If you turn off the mesh, does the contour reappear?

Re: Separation line between slab and mesh not showing after boolean operation

alessiofazzi — Thu, 15 Jan 2026 15:02:42 GMT

yes it does

Re: Separation line between slab and mesh not showing after boolean operation

Lingwisyer — Fri, 16 Jan 2026 01:26:41 GMT

Try changing the Draw Order of your slab.

Re: Separation line between slab and mesh not showing after boolean operation

alessiofazzi — Fri, 16 Jan 2026 07:30:44 GMT

Thank you Lingwisyer, i tryed it but unfortunately it doesnt work

Re: Separation line between slab and mesh not showing after boolean operation

Eduardo Rolon — Fri, 16 Jan 2026 12:15:24 GMT

I've seen this happen when you use a GO for the walls/slabs.

Also check that there are no duplicate slabs or meshes and/or move the section to see if there is something wrong with the section location.

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Usually my workflow is to avoid doing SEO's in that case and use "Send to Back" for the mesh/

Re: Separation line between slab and mesh not showing after boolean operation

Eduardo Rolon — Fri, 16 Jan 2026 15:32:54 GMT

A new wrinkle I just notice in 29.

If the Mesh renovation filter is "New" then "Send to back" does not work if the other walls are existing. Looks like "Send to Back" works only for elements within the same filter. Have not noticed this before.