That's interesting. I can "force" vague images, but it takes effort. I can get very clear image when dreaming, and on occasion when meditating (I had one experience where I experience what I could best describe as "being in a movie set" - it looked and felt absolutely real, but I knew it was not, as if on a set rather than being there), but when e.g. reading it's always abstract.

It'd always seemed weird to me that some people seem to visualise so much detail.