yup.. basicly you just have to make sure you are saving as Quicktime and don't use some 3rd party compression... use only quicktime suppoerted.. it works great.. one other thing.. when you render the orginals in carrara.. make sure the size is equal to or greater than you want your final movie res to be. Imovie can down size the resolution, but it's kinda crappy at upsizing. same goes for frame rate etc.

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Hexagon, Carrara, Sculptris, and recently Sketchup.