Hello,
This is a great tool! There does seem to be a problem though, the markers can become truncated at the ends of splines, and when this happens the marker will be made with two faces. When you add the cars using forest, two cars will appear and one of them will have an incorrect rotation. Unfortunately, there is no collision detection when using reference objects.
Is there a way to get the RC not slicing the ends off the markers?
J.