I'm wondering if this sort of thing would make dreams unstable and fall apart. I'm curious about it but I'm not good enough at LDing to try it out so I was wondering about it.

Can you do something like make a plate with a lid on it say "The best food you'll ever eat" and then open it and it will be something your subconscious decides to be the best food?

Or make a door "To paradise" and go into the best place your subconscious can create, not you consciously picking out the scenery and such?