Are pixel fighting textures acceptable?

[Milkeno]

Are custom textures with particularly bad pixel in-fighting considered unacceptable for a mod?

[Shepardus]

Depends on who you ask. Some abhor it, some think it's part of the charm of the game (I'm in the latter camp). Some source ports have things like anisotropic filtering to mitigate the effect, so I'd say it's fine if your WAD exhibits such effects without filtering.

Edited June 15 by Shepardus

[Xaser]

This sort of thing is pretty much expected when you're playing at low-resolutions -- it's part of The Look(tm). Even BTSX does this at parts. ;P