Cool idea, but it is a lot more work to make 2-D animation than it is Lego, in my opinion. Having worked in both pen & Ink 2D and now Lego, I weighed the advantages myself while new at brickfilming:
The primary advantage to brickfilming is that the animator doesn't have to redraw the characters every time they make a new movement.
The primary advantage to traditional animation is that the animator can reuse animatoon cycles on new backgrounds without having to redraw anything. For instance, a bunch of cells with a character's walk cycle can be placed on any other background anf be reused anywhere. Also, the animator only has to make the character make two steps and the cycle can be repeated to make the character walk endlessly. In Lego animation, if a character is walking across a room, he must be animated for every step he takes.
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