I thought I had an idea of what was cgi in Indy 4, but then I come along to this page (it's shooting locations for Indy 4):
http://www.imdb.com/title/tt0367882/locations
Take a look, you'll see a lot of location shooting listed.
So what was cgi and what was real in the film?
Sure, a lot of stuff didn't look real, but I'm not going to trust my judgement on this.