Hm, thanx for answering. Nexus is clear.
Still, I can't figure out what is different between MDL entities. Let me be pore precise:
In a level I have a chair and a desk. Both are modelled in Rhino and skinned and saved as... in MED.
As player I can walk through the desk but not through the chair. Both are high-poly (>2000).
I reckon it has something to do with the hull but I don't klnow where to set it and what's more important: how can I take this in account upfront when I am making the model.
I've searched related subjects in the manual but find no answer.
Please advice

Salute!