So I'm firmly in type 2. I can close my eyes and just see black/the back of my eyelids. No matter how hard I try I will never be able to "override" my actual vision. Instead, I have a sort of "mental" model in my brain which can handle imagery and 3d scenes and such, but it's very different in experience than my actual vision. The two don't overlap at all for me.
"ghostly" is how I'd describe it, but it's really a different set of qualia altogether, not a "faint" version of my vision.
But yeah as you mention a few comments here kinda makes it sound like it's just a matter of practicing visualization (trying to create objects within my actual field of vision, as well as "emphasize" or "focus" on my #2 visualization). I'll have to spend time seeing if I can practice it...