By 1, do you mean you can picture all the details of an image in your mind, or do you mean you can turn visual hallucinations on and off at will?

I suppose that's strictly true for me even though real visual input completely overrides the hallucination. It's like comparing the Sun with some random star. However, there was that one time I smoked way too much weed, which had an effect of greatly augmenting my mind's eye so it became comparing the Sun with Venus. Visual input was still at the forefront, but you now had the mind's eye image of the object being superimposed on the actual object.

If you're talking about just being amused by the floating images when the eyes are closed, yes I've done this countless times. I don't see this as any different from replaying movie dialogue or imagining eating something delicious.