Thread:Deathstalker666/@comment-5641163-20150522174501/@comment-3547390-20150522185127

Actually, I have heard that Darkplaces replaces a lot of elements with their own, which leads to certain instabilities when using it outside of its intended area. It is for this reason that you can't play a multiplayer game with someone that doesn't use Darkplaces if you have it, both are calling up separate instances of materials in the world. It shouldn't matter too much in a vanilla playthrough as Darkplaces was designed with it in mind, but it can have some complications when calling upon custom resources in certain mods :P.

I am a Quake 1 nut, I have never attempted to play Quake 2 (though I plan to at a later date) and therefore my main focus here is on Quake 1 related information.

Heh, sounds like what was happening is that your resolution is different in-game from your desktop. As I have mine always set at 1920x1080 (highest resolution in GlQuake), this is one of the many reasons I don't normally play around with the original Dosbox or WinQuake. Actually, when working on the Wikia (especially the walkthroughs) I would be alt-tabbing constantly so as to ensure its accuracy.