New Vegas developer Obsidian has defended Fallout's GECK engine, amid criticism from press and public.
But senior designer Chris Avellone insists that from an RPG and open-world perspective, the GECK tech is "impressive".
"One thing I like about GECK is that when it comes to creating an open-world environment, like we've done for New Vegas, it's pretty impressive and took care of a lot of what we needed - and we have experience with working with an open-world engine before," he said.
"Being able to see that technology and see how [Bethesda] structured all of the data was really important for us as a studio and we thought the GECK was pretty solid, even though it's been through a couple of iterations and is a long standing piece of technology," he added.
"Technology does get out of date pretty quickly, so as long as it's functional that's all that I care about. Also, I care about the fact that the mod community can now take all of the stuff from New Vegas and run with it, and hopefully we'll have plenty more RPG spin-off to play in the next year or so."
Avellone conceded the GECK tech doesn't offer the prettiest visuals, but insisted it helped Obsidian create a fun RPG.
"From an RPG perspective I care more about the game mechanics and I think the GECK really delivers there," he said.
"I'm not going to say it's the prettiest engine out there - it doesn't have the best animation and there's certain limitations to the facial structures you can build with the characters. But at the same time it allowed us to create really fun quests, really cool characters and a really huge world that was fun to explore. So from an RPG perspective that's what I want."
Fallout: New Vegas is out in Europe today. Check out PSM3's Fallout: New Vegas review if you haven't already.