Quote Originally Posted by whiterain View Post
is the subconscious powerful enought that it knows enough about the physical world to recreate it all accurately in a dream state?
It's not a question of "can it?" (It can.) It is a question of "will it?"

The problem comes in that, when you're looking at your surroundings in a dream, as projected by your subconscious, you are looking at those surroundings out of time. That bottle of water that is on your desk, in waking life, may not be there, in the dream. You have looked at that spot on your desk numerous times, while awake, so your subconscious remembers that particular spot in a sort of "superposition." It remembers how that spot has looked, over the course of however long you have been around it; bottle; no bottle; papers; no papers; etc.

That is all on the premise that your brain is projecting things you have actually seen. You also have to contend with imagination, which could completely rearrange your furniture, in ways which you have never actually seen them arranged, in waking life. Unfortunately, I don't believe there is anyway to actually delegate whether or not your mind presents to you a picture of how your surroundings actually are, or not. It does this on its own, depending on the streams of thought that are going on, outside of your range of perception. The only way to ensure that your dream projects your surroundings as they actually are, is to arrange them yourself, while lucid. But this would kind of defeat the purpose.