Separation line between slab and mesh not showing after boolean operation

[alessiofazzi]

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

[Lingwisyer]

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

[alessiofazzi]

yes it does

[Lingwisyer]

Try changing the Draw Order of your slab.

[alessiofazzi]

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

[Eduardo Rolon]

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/

[Eduardo Rolon]

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.