I got a BSD (twice) exporting a track with a fair number of trees. The second time I started from a fresh reboot and got the same experience. It appears that some of the export has been done. It's pretty tough for a user app to produce at BSD, so it must be a problem with one of the library's BTB is using. My guess is in .NET or DirectX or OpenGL. Question: I know BTB uses .NET framework. Is it using DirectX or OpenGL for the graphics library? Thanks!