Hi, found it, thanks a lot, but I've got a little problem when trying to use the code for my models: I've removed the skybox and so on, placed a new one and rebuilt the level, but strangely there is something like an invisible wall. How can that be? And if I set the track to 'polygon', it gives me an error message about the line where the c_trace or move is written in

Could someone please help?

Thanks in advance
Felix