Earlier quoted context omitted.
My mental images are usually very similar to how you described yours. I'm also "creative". I've casually self-diagnosed myself as "not being able to see images in my head". However there have been times where I've had picture perfect clarity of something in 3d, including color, but it only lasts for moments and I've never been able to conjure it on purpose.
I was friends (more aquaintances now since I haven't seen him for quite a few years) with an incredibly talented artist / illustrator. I worked with him for a period and would place him more than anyone else I have ever met in the genius spectrum based on a number of factors. One of them is that I know that he can vizualize fully formed images, to the extent that some of his work is just transcribed directly from wha…
FWIW this is sort of a thing that the process of becoming an artist trains you to do. I have been a professional artist for a couple decades and it is much easier for me to do this sort of thing than it was when I was a kid. There's a lot of steps involved in projecting a mental 3d model onto a 2d plane that I can just do in my head now because I've done them so damn many times.
There's definitely an innate level of doing this as well, some people start with a big boost, various psychoactive chemicals can help (I have done so much work while slightly stoned for the performance boost it gives my visual cortex), and then there is that story about one 1940s animator at Warner Bros. who got in a car accident that involved a degree of head injury, and could suddenly just "trace" stuff directly off of his mental images onto paper once he recovered.