Back in 2002 those graphics were really good for an RPG. I don't know at what age you began gaming, 2010 or so i suppose, but 2 years earlier from NWN we were happy to get 2D DND games like Baldur's Gate II, and 3rd person action games looked like shit. Go play some other RPGs from 2002 and tell me that anything had better 3D graphics than NWN.
"NWN has great graphics" was a forced meme from game journalists. Morrowind had better environment art, Gothic 2 was more palatable, Arx Fatalis beats them all. Granted, NWN was limited by the necessity of using tiles for easier level creation, they still made some bad stylistic decisions.
I don't care about game journalists, i have my own eyes and i played it at release, alongside the games you mentioned.
You shouldn't compare NWN graphics with first person games like Morrowind, because NWN was supposed to show more models at the screen and a larger area and quite frankly better animations. And Morrowind ran like TOTAL SHIT back in the day. I owned a P3 666mhz and a Geforce 2 Ti 64MB back then, and while NWN ran like a dream with all settings maxed out, Morrowind ran like GARBAGE and its animations were the stuff of nightmares. Gothic 2 ran well but its textures were shitty, and Arx Fatalis fooled everyone because it had bump mapping, but it had close corridors that were more easy to display so it could afford some more detail.
NWN had the best TEXTURES of all RPGs back then. Great quality especially at 64MB settings. Even today the textures hold up, contrary to garbage like Morrowind. Even Oblvion had worse textures than NWN. Morrowind landscapes only looked good from afar, up close they were shitty.
You people are blinded by nostalgia, seriously.