You can find here 1650+ doom3 textures converted to oldgen engine texturing (no normal, height or spec maps).
(they are available as individual PNG and zipped paks)
> > D3RetroTex on GoogleDrive
You can use these freely, have fun, no credits needed, excepted maybe for the awesome id's artists =)
-brightmaps, animations, wad (any help, advise, tips are welcome here, I still don't have a lot of experience in this domain yet)