Strange First Person Effect

[Epix]

Whenever I'm in first person, there is this strange effect when you look up or down. It looks to me that the game is try and stretch the image for some reason when looking up or down. Is there a way to change this to be more "normal" via settings or a mod?

 

[klasky]

Are you using Software? If so, then that's normal. Use OpenGL, so that the strange effect disappears, unless you use "Lack of Perspective", which then has the strange effect again.

 

[SeventhSentinel]

Let's have a quick history lesson.
SRB2 is a game based on the same engine that Doom II uses. In Doom II, you cannot look up and down. The camera Doom has doesn't draw a true 3D image. To get around this without creating a brand new software mode renderer, developers simply extended the vertical area of the camera's view, then allowed players to scroll it up and down the screen, creating the illusion of looking up and down.
Check the Doom Wiki for more info.

 

[Icarus]

That's the Doom Legacy roots of the game as 7th Sentinel said.

Doom still had some (limited) 3D elements via the z-axis but things like bridges were impossible.

Legacy and Robo Blast 2 allowed such things.