Maybe someone has better resources, but I found it interesting that the paper linked within about the particular patient MX, says, ...mental imagery is ubiquito

Maybe someone has better resources, but I found it interesting that the paper linked within about the particular patient MX, says, ...mental imagery is ubiquitous..., but I can't find an example of what people consider mental imagery. Is what I consider mental imagery the same as someone else? I dunno. FWIW, for me, mental imagery seems to take the form of a very brief flash when I'm thinking of a simple object, like a rock, for example. But I assume it extends into less concrete things like when I'm daydreaming, where there is no distinct clear image, it's more of an inner monologue of themes/intent with a few flashes of imagery here and there.