Last night the image I held to was a sort of flat, grayish box with a bunch of other shapes on it. I just kind of kept thinking about it as I did my stuff. But as I crawled back into bed, I had a revelation.
Wait a second. That grayish box. It's got other grayish boxes on it. It's like a piece of paper, maybe, or something you'd see on a screen....
Then it hit me. A wireframe? I've been dreaming about a wireframe?