I have very good spatial awareness, but it’s non visual. I can navigate my way mentally through a spaxe and “feel” where the walls are without seeing them. I have a sense of how big something is compared to something else and where they are relative to each other in space, but all non visually.

And I can rotate objects in my mind and change my perspective around them, but all without any visual elements.

I can sense the mental cube, but I can’t see it. It has no colour, no texture etc. Imagine a sort of mental bat sonar?