I have some pretty vivid lucid dreams from time to time.
I had one recently that just completely blew my socks off: In the dream I spent some time walking around and some time riding on a bus and I kept looking at everything and thinking to myself, "My God, my mind is creating all of this, this whole complete world, down to the most minute detail".
One funny aspect is that I kept freaking out because I realized I didn't have my wallet or my phone, and I had to keep reminding myself, "They're still there next to your bed in that other place", the "other place" being the real world. For some reason I couldn't remember what to call the real, waking world, or even the concept of waking up for that matter.
Also remember reminding myself that I didn't need them (my phone and my wallet) in this place anyway.
Another strange aspect is that things seemed to be in sharper focus in my dream world. Colors were more vivid. Everything was exceptionally beautiful.
Another weird thing is that all the people that I saw in the course of my dream were male, and at one point it occurred to me, "This is my world, I'm creating all this. I should be able to create anything I want here. Let's see if I can create a few women".
I couldn't.
Even though my mind was creating everything I didn't have any control over any of it. I was just going along for the ride.
Have to say it was every bit as real as the real world. More so in some ways: as I mentioned, visually everything seemed sharper, more "real".I could also feel things physically (not sure if my sense of smell was working there. I'll have to test that out next time)
All in all it was a really cool experience.