As a 3D stereographer, I am always aware of the 3D space in front of me. And when shooting 2D, I often wish I was shooting 3D!
The key idea, in this linked column, is that by learning to see in 3D, we can improve our 2D photos. You might think “seeing in 3D” is obvious – after all we see a 3D world around us. But truly, as 3D photographers know, learning to see in 3D is a technique all unto itself.
About negative space, looking 3D and some other things.