kn5 file and replaced the curbs.kn5 in the mod's track folder. Everything looked great in the viewfinder and I saved it as a. Once opened in Blender, I edited the curbs's UV mapping and touched nothing else. fbx file using 3DSIMED3 so that I could open up the. To do this I exported the curbs.kn5 that came with the mod files to a. I wanted to change the UV mapping for the curbs on Mid-Field Raceway (a custom mod track from Gran Turismo to AC) to make them more accurate to the original game (for personal use).