I've been trying this for a while now. I still have yet to reach another dimension. Last night was probably the closest I've come. I told myself in the dream that I was going to go to the fourth spatial dimension, and jumped through a mirror. Everything went black, and I started falling very quickly toward some large yellow thing, like a large curved yellow plane, which also had orange under it (hard to describe). Anyway, the closer I got, the bigger the rush got. It eventually felt like overwhelming amounts of energy was overtaking me (very unpleasant), so I left the dream. I had a second lucid in which I was about to attempt, but instead decide to practice my flying (which is very fun once you get good at it).

Anyone reach any crazy new worlds, other dimension, universes, etc in their lucids? And how did you go about doing so?