In several occasions, after very intense and new visual stimulus, (e.g. being the first time in a forest, watching "where dreams may come", playing a beautiful video game for the first time, strangely, playing checkers for almost the whole day) i could close my eyes and literally see scenes similar to the scenes that had made impression on me.

After several days the images would fade and i would return to not seeing anything.

So i also wonder if those realistic images i could see in those few occasions are the norm for other people, or if they have not seen such images and describe something else as seeing.

Also somewhat related i have similar experience with sound, while normally i can imagine music as my inner voice singing, but on some occasions i could hear the whole orchestra. And here as well, people describe different experience from hearing to not having an inner voice at all.