The tracks were created using my own simple editor which was written in the same language as the game - Blitz3d. There are approx 1000 different 3d tiles which are placed on a 9x9 (2 layer) game grid to form the track. I don't think a video would help.
I m making a 2d top-down racing game in unity but I don't know how to create tracks in it. So can you help me with. Can I import tracks created in Blitz 3d in unity??