I could see 2D images as kind of 3D.
It used to happen when I was going to sleep and I'd stare at the wallpaper of my bedroom and the print would appear to lift off and stand in front of the wall. Kind of like a magic eye pictures before they were a thing. Weirdly I could never do those magic eye pictures despite trying over and over at first. Eventually I could but it took a long time.
I can also turn myself around mentally to make it feel like I'm travelling in the opposite direction when looking out of the window on a train in a dark tunnel.
I discovered as a child that when having a nightmare and running away from something and it's like you are in slow motion that if I turn myself around I can run backwards faster. I can consciously turn myself round to run backwards.
And tell myself in a nightmare that I'm dreaming and to wake up and I do wake up.
Anyone else do things like this? It's probably completely normal but I've been met with weird looks when I've spoken about it to others.