Excellent training programs. I have a question. I am designing a roller coaster track, and when i design my loop, the mesh follows the curve but then it rotates when it goes through the loop. How do i make it so that does not happen. I added my file here to demonstrate what it is doing wrong. I used the tilt process through each point, but that took a long time. Is it possible to allow the mesh to follow the curve and not twist along with it?