Yeah I do them directly. If you're interested you can watch me draw here. www.justin.tv/boss_toshinho/b/… The perspective drawing starts after 20:00 or so. Not the best footage but I hope it show you some idea.
Oh man I love these. Every time I tried to do the bent perspective, I always had to put it back into the correct way x__x~ You wouldn't happen to have any tips on doing this wonderful warped feel, would you?