Technically, movies such as CASPER with Christina Ricci, and Bill Pullman, the STAR WARS prequels, every MUMMY movie with Brendan Fraser, ARTHUR AND THE INVISIBLES and James Cameron's AVATAR involves a mixture of live-actors and computer graphics, but personally, I believe that, as long as there are live-actors & no dialogoe like "I'm a toon", "I'm a cartoon" or "You are an illustration", they are live-action in my book.
Who else thinks along the same lines?
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To Cowabunga and Beyond!