Yeah. This looks constantly strange due to the CGI, even if I got a little used to it during the second ep. Normally I don't mind CGI in animating vehicles and other such machinery because, to be utterly realistic, we wouldn't have this many anime shows without that huge cost saving method, but these kind of full-CGI shows are nastily plastic.

Other than that, I have doubts about the realism in humanity abandoning the seas compeletely as opposed to using a few nukes.