I dont know if this helps anyone, but
http://facelift.quakedev.com/retexture/ was a project to update quakes original textures to higher detailed ones. All textures where designed from scratch and quote from the site -
1. Can I use the textures for commercial as well as non-commercial usage?
The textures are made from scratch and are copyright by their respective authors and, collectively, this project. These textures are free to use in any project, be it commercial or non-commercial, on the condition that the work or the derivative product mentions the URL (
http://facelift.quakedev.com ) and name of this project (Quake Revitalizatoin Project) in the credits. In case your project does not have a suitable credits section, you must include with your product a file titled "readme" or "licensing". No exceptions. For any further questions, contact me.
Im sure this will be helpfull to someone. Ive noticed oa_dm2 has such ugly looking textures, maybe you can use ones from here? There are so many great textures to use, is it possible to use these in oa?