Ed Leonard , CTO of DreamWorks Animation , says it took approximately 45.6 million computing hours to make `` Monsters vs. Aliens '' , more than eight times as many as the original `` Shrek '' .
Ed Leonard , CTO of DreamWorks Animation , says it took about 45.6 million hours to make `` Monsters vs. Aliens '' , more than eight times as many as the first `` Shrek '' .