Yeah, lucid dreaming while napping is much more frequent. Sometimes when I miss out too many hours of sleeping, and thus have the desire to nap, ill go take a bath. While not actually trying, I produce a WILD lasting up to an hour and a half, which is the time it takes for the water to get cold : p

Unfortunately, theses dreams are rarely complicated in their nature. This is due to the fact that they are caused by a need of recovery. Anyway, they are still very enjoyable.