Thanks for your replies - I posted a screenshot of my material.

In the meantime I think I figured out something. The smaller the populating objects are, the less they will invade the forbidden space. I think it has to do with how Vue treats their geometric bounding box. It seems that the ecosystem allows objects to show beyond their defined area, as long as part of them is still inside.

I can't think of a way to tell Vue that the whole object should stay inside the defined area.

Talley - the foreign object idea sounds like a smart workaround, I'll try that later.

Leo.