As someone who both loves the design of the movie and has spent time living in Paris . . . it is caricatured. It is very
Well Caricatured - it isn't egregious, it has a strong basis in the truth - but it's not a photorealistic representation of Paris. That's not a criticism - it's an animation, it would look weird to have cartoony Rats scampering over perfectly realistic rooftops. It was clearly their intention to soften things a little.
Soul does the same - there's been a lot of talk of the accuracy of its representation of New York City, but anyone who lives there will tell you it's still a caricatured version of it. It just selects the right things to caricature. Pixar is very good about this.
Ratatouille does this too, and it's reflected even in the arcitecture of the new facades in EPCOT - everything's a little more squat, the walls run at funny upward angles, the pipes and chimneys are eccentric. The existing France Pavilion facades are generally very slender with a lot of verticality and upright angles, and the pipes all run in rational ways. Even the Cornerstones are perfectly
"stacked" - in Ratatouille they're all stacked irregularly.
Compare:
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I've got screenshots from the film that I can share as well, but I figured for the topic at hand the actual constructions in EPCOT were the most pertinent.
Again, none of this is a knock against Ratatouille or its interpretation of Paris - but it's fair to say it doesn't follow all the same rules as the 82 original France Pavilion. They're both different interpretations of the same source.