For me it was in a dark environment (bedroom), but I was looking at my phone, without glasses, and holding it pretty close to my eyes (I'm also heavily myopic) so that it occupied maybe ~60% of my field of vision.
The "picture" I had in my field of vision never changed, the "pixels" (though I don't think there is such a thing) did not change. But suddenly my phone was this giant monolith just above my head.
Consciously I could clearly tell this was a hallucination, but the dissonance of having this seemingly suddenly huge object held right above my head was really unsettling to me, a bit scary even.
I'm so used to not questioning how my sense of scale pretty much always matches what I see, it never occurred to me my instinct could be fooled by this wide a margin while consciously seeing that everything was normal.
But on the other hand, I can't say I've really ever had an unusually distinctive awareness of objects like you describe.
Does this happen in total black ? I sometimes (really rarely, like once or twice a year) have a strange « feeling » at night while in my bed without any source of light : I can distinctively see the objects around me.
The twist is : I’m heavily myopic and even with my glasses (which I don’t wear at night) I can’t see anything in the darkness. So there is no way I could distinctly see things with their contours in the darkness.
It only happened in places I know, so I can’t know if my brain is making my bedroom up or if I really see something, or if it’s a combination.