LDraw Pattern Creator/ LDPattern Help

[Philippe Hurbain]

By now I'm working with CSG intersection points, but maybe there is an easier way.

That's what I do (eg. on this part)

It tried with moving a vertex that has a triangle attached and sometimes it worked and sometimes it attaches to the wrong border. I don't get how this works.

I was not aware of this method - too bad it's not consistent!