Problem with mesh

BlitzMax Modules Forums/MiniB3D/Problem with mesh

I friend of mine is creating football stadiums in SketchUp and exporting them as 3ds. I convert them to b3d with Unwrap, but when I put them into the game this happens...



The fence should be behind the stand. However, if I use the Blitz3D SDK with Max it appears fine...



How can I fix this?