That being said, regardless of what technology is used to create the setting for a film adaptation of Foundation, it would have to be considerably ground-breaking and not your average "sci-fi" look. This because Foundation is set tens of thousands of years in the future and life would need to be fundamentally different. Throughout Asimov's Robots-Empire-Foundation timeline stories are hints that the human race has evolved somewhat since then, like when the protagonist of "Pebble in the Sky" ends up in the future and they're surprised to see where he has hair growing and that he has extra teeth.
Emmerich is just about the worst candidate (Michael Bay aside) for making a good film adaptation of Foundation, if one is even possible at all.