Papyrus original tool to create & modify tracks. Can be used in conjunction with many other tools on this page for track creation, also includes these command line tools: make3do (creates 3dos from .pas files), makemip (creates mips from .tga files), mklib (packs or unpacks .dat files), mkstalls (cr...
Centerline is a track editing program. It uses base xml files from the orginal tracks that allows you to modify into your own track. It handles segments, lats/alts, banking, transitions, walls, surfaces and even lp files (AI) now. T3 Superspeedway was built during the development of CL.