It's not hard, in fact it's not much different to a regular automap:
- Drive (fly) once around the lap, stitch and see where the holes are.
- Drive around again trying to go over the parts needed. This involved a lot of crashing in the jet stage.
- Stitch and merge, see what holes are left.
- Take a few more screenshots to fill in the remaining holes, or use grid alignment to make it easy to replicate graphics for the small holes.
For the jets, the brake has some effect which makes it a little easier.