Are sourceports okay for speedrunning as long as they don't change the gameplay? In my case, the original Rise of the Triad doesn't have proper mouselook, but WinRottGl allows mouselook, higher resolutions and and improves the audio quality. I don't think it changes much else.
E: Seems like Chocolate Doom is allowed. *Shrug*
E: Seems like Chocolate Doom is allowed. *Shrug*