Psyringe: I'm looking for the name of a specific graphical distortion "effect" that sometimes happens in games with first-person perspective. I sometimes want to mention it in reviews, or talk about it and ask about ways to fix it, but either is a bit difficult when one doesn't know how to call it. Since we have people with programming experience here on GOG, I thought perhaps somebody might be able to help me out?

The effect that I'm talking about is a distortion in parts of the screen when turning your character in games with first-person perspective. It's similar to the effect that you'd get in real life when you hold a projector in your hands, and turn on the spot, so that the projected image wanders from the left wall to the back wall and then to right wall. When you do that, the image will become slightly distorted in the corners of the room, due to the projection angle and the slight difference in distance. Therefore, while the image wanders across the walls, you'd see it being slightly stretched and compressed in an unnatural way.

I'm often seeing this effect in games, especially old games, or newer ones after increasing FOV. So, questions:

1. Do you know what I'm talking about?
2. Do you know a name by which that effect is called (so that I can look up further information)
3. Can you explain why it exists and which options exist to prevent or fix it, or point me to thee respective information elsewhere?

I hope that's making sense. I should add that it's perfectly possible that these questions are foolish, I just don't know and I'm curious. ;) Thanks in advance for any help!