When something floats by in the world outside my brain, for example when someone said orange and everyone at a meeting had a visual of something political, I did not. I was thankful for it. I had the concept of an orange, or the smell of it, but no visuals.
I don’t have visual dreams. I have dreams relating to smell, sound, space (like the feeling of being in a crowded, smoky bar. That’s all vivid to me. But I don’t ‘see’ anything)
That doesn’t mean my brain isn’t an overwhelming place. It’s just overwhelming in other ways.