On those occasions sometimes when every wall you look at has no art on it, use your finger as an imaginary art gun. Shoot the wall with an imaginary bang. Once a painting appears, every wall will start to have lots of paintings on them for the rest of the lucid dream.
On those occasions sometimes when every painting you find seems pointless and not worth memorizing, "think about thinking" for a few moments then move on and look at the next painting. You'll see that all the previous paintings were uninteresting because you were not thinking about anything as you were looking at them.
Ignore the lucid dream's details, fun, and drama so instead you get good at only looking at paintings and see the most paintings per year you can.
After looking at a dozen or so paintings, if you see a good one, stop and memorize it for a few seconds, then keep moving to find some more paintings if you don't want to wake up. But if you do want to wake up with that good painting fresh in your memory, then stay there memorizing the painting until you wake up. The lack of stimulation from the lucid dream will wake you up.
a few tips
