Laika is back with their second feature, ParaNorman, which is also earning rave reviews. But is the 3D as much of a slam dunk this time? Is it still the only way to truly experience the movie? To help you answer that question, here's our latest installment of To 3D or not to 3D, in which we run down the key components of any 3D movie experience and help you figure out which ticket to buy. Before you head out to see ParaNorman this weekend-- and you really should, it's terrific (my full review)-- make sure and read this guide first.