Also, off topic, but has anyone seen the trailer for 13 Minutes? Heard the film itself isn't that good, but that has got to be the most realistic CGI wedge tornado I have ever seen. Even has a collar cloud! Somebody really did their homework. Most Hollywood tornado scenes have that unrealistic, smoky-looking, overly textured appearance, when in reality, most tornadoes have more of a "2-D" look to them. As a result, less detail and texture actually makes it look more like the real deal. Whoever animated the movie clearly figured that out.
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Here is one review. Most are mixed.
13 Minutes