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These are all shots of CGI animals, but despite their high quality, the last one is less likely to fool people because they KNOW that you can't actually film a dinosaur. Please remember that when you're criticizing the CGI of fantasy creatures, there's already a bias in place.
People complain about the dinosaurs in Ice Age "not looking like real dinosaurs", and yet there never seems to be any criticism of modern-ish animals in the series.
It's almost like they're designed to be expressive characters, and the dinosaur community has an elitism problem.