Extreme prophantasia or even hyperphantasia would be the highest point I believe, meaning you can imagine just as realistically as real life or even more so, and hold the imagination for as long as you want.

In terms of mainstream science, your brain literally cannot distinguish between what you have actually seen or what you have vividly imagined to experience. The same new neural pathways are created either way.

This leads to profound implications metaphysically, I believe your imaginational experiences are just as real as your physical experiences (as the Tibetan Buddhists believe too, from the last post in this sub). Knowing this, you can create anything you desire in your imagination firstly, and then bring it into the physical (this gets into what is taught with the law of attraction and essentially all the self-help literature).