(OBSOLETE)---------updated version, available now.
Getting Waifu2x-Caffe(thanks to ZerterO) and Q3A-A ripped higher-poly weapon models (thanks to AndehX of QuakeWorld) got me motivated in re-doing my "HD weapon texture" mod.
This mod is created on (and for) vanilla Q3A, updated to point release 1.32. So I don't know if this is compatible with any other versions or ports. For more in-depth info, zip file includes readme file.
Links:
Waifu2x-Caffe - Waifu2x.me / Github.com
AndehX thread - Quake3world.com
ZerterO's mod page - Moddb.com