Hi there,

I've tried OpenSCAD for mac (v2015.03) with a sample form.
My goal is to create an empty box (with a cover not yet designed).
The same code doesn't give the same preview.

Under macOS, the box doesn't seem to be empty
http://forum.openscad.org/file/t2373/macos.png

With OpenSCAD.net, the same code does show an empty box
http://forum.openscad.org/file/t2373/openscad.png

I did try the developer version (v2018), I still have the same issue.
I think the code is ok, but just in case, I'll give it attached.

Here it is the code.
emptybox.scad http://forum.openscad.org/file/t2373/emptybox.scad

macOS : High Sierra 10.13.4

Any ideas?

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I see Z-fighting:

This is an issue with your code:

https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#What_are_those_strange_flickering_artifacts_in_the_preview?

please make the box you are using for the difference a bit bigger then
the volume you want to remove, so that it is not ambivalent whether the
surface has to be removed or not.

With Kind regards,

Michael Frey

Oh, thank you. I didn't know that wiki.
I'm gonna read it right away.

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