Quick racetrack tutorial in Silo2.1
1. Open Silo 2.1
2. Hit 5 top get top view in the viewport
3. Create->Edge Tool
4. Draw your track
5. When done, hit Enter, Esc, F, click out side the path so it's deselected
6. Hit 2 to get Front in viewport
7. Create the road profile using the Create->Edge Tool
8. Move scale the profile at place it at the begiing of the track path
9. Have both the profile and the track selected
10. Create->Path Extrution Object
11. Now it looks really edgy and not very nice
12. Hit C (subdivide 2-3 times)
13. Hit Shift+C to refine mesh and export it to rad.
Have fun
1. Open Silo 2.1
2. Hit 5 top get top view in the viewport
3. Create->Edge Tool
4. Draw your track
5. When done, hit Enter, Esc, F, click out side the path so it's deselected
6. Hit 2 to get Front in viewport
7. Create the road profile using the Create->Edge Tool
8. Move scale the profile at place it at the begiing of the track path
9. Have both the profile and the track selected
10. Create->Path Extrution Object
11. Now it looks really edgy and not very nice
12. Hit C (subdivide 2-3 times)
13. Hit Shift+C to refine mesh and export it to rad.
Have fun