Interesting. (I could not fold 3-D figures.) I don't really visualize things clearly, just kind of imagine shadows and lighter spaces. (Probably has to do with having to remember different habitats - mosaic leafy forests, high-albedo chalks, 'cupping' meadows, 'weightless' rivers, tunnels of forest roads, 'airy' conifer forests, entrances to the underground. If the contrast is high, like the interior of a bus in the evening but not in the afternoon, it is easier to imagine.)