i will then have to go through my plugin code ,has to be a bug in the polygon/triangles functions or something im missing with the mesh creation code ..will not give up untill i have found the problem here its unacceptable to me !! 3run you could still remark the 3 debug draw functions in main.c and look at the demo if you realy want to but i know thats besides the point ,to tired to work on this now but will start tommorow