Hi Tudor,

re:
> external link, out of space https://www.sendspace.com/file/zara2u
> any red/orange selection

Thanks, I can repeat the extrude artifacts over here now. But they only seem to happen when the extrusion is a very small distance away. Once you move more than about 1 unit the artifacts disappear. Is it the same over there?

I think the artifacts are related to difficulty in doing boolean calculations on small slivery objects.

I might be able to improve this, I'll put it on my list of things to investigate. Thanks for sending it in.

- Michael