Most usual are gaps (holes) in the GTK so be sure, when you are finish working on it, to zero all the gaps and eventually (seems better) leave a few units of overlapping like -1 or -10 or what ever just for the longitudinal gap; the other 2 gaps can stay 0, the orientation is mandatory to be 0; the lateral is not necessary but if is 0 is better thatn any other value.
With the GTK you make both the TRK and the track 3DO and both files can cause problems if have holes.
Another thing that cause freeze is the FB file with a too big sudden increase in the drawn distance; this cause GPL to load too many polygons in a too short time and can result in a freeze.
Edited by Ginetto, Mar 09 2012 - 01:12 PM.