Ok. Because I thought it would be a funny idea to show you how I build my maps, I recorded my whole building progress in the Trackmania 2 Valley editor.
Because the normal video has a length of approximately 4 hours I have narrowed it by speeding things up a bit (3000%) with some background music.
YOUTUBE: Building a new map for Trackmania 2 Valley with NeonovA!
You will see that you need a lot of testing before a track finally runs smooth.
The track that I made can be found here:
http://tm.mania-exchange.com/tracks/43340/maravilla
Hope you like it.