Danlord
Member
I remember Carmack saying that Id tech won't work too well for open world games like Fallout and Skyrim because of texture and loading issues. You can bet that F4 is running on heavily modied versions of Gamebryo/Creation engine. It'd make more sense for them to build off of what they have now. Plus the engine is still the one to go to, for better or worse, when it comes to making an open world game with so much volume.
Yeah come to think of it, I vaguely remember something like that. But RAGE is fairly decent in handling an open-world nature, albeit with streaming issues due to reading off PS3 Blu-ray and Xbox 360's DVD, but now that we have HDD streaming and Bethesda/id Software can optimise for HDD-streaming better, it might have solved *some* of the issues with that.
Thinking now, if they had id Tech 5/6, it wouldn't (as is) be open to modding and Bethesda are good at handling mod support for the Fallout/Elder Scrolls games, so that goes against that.