Hello Dorin,
first of all a big thank you for providing this plugin. It will save a lot of time compared to designing a roof with external tools and import it to SH3D.
I am struggling with creating a hole in a roof. You showed in this thread how it should work.
You gave a hint to have not a square hole but a 5 corner hole. If I do it like this, it works.
But if I want to have a square hole it looks like this



and if I try to make the side areas to 90° I get this:



Can you give me a hint what I am doing wrong here?

Thanks in Advance

Best Regards

Harald