1. A system for modifying data representative of captured motion, the system comprising: a processor; and a memory communicatively coupled to the processor when the system is operational, the memory bearing processor-executable instructions that, when executed on the processor, cause the system to at least: receive image data of a scene, the image data including data representative of captured motion, the image data having been captured with a camera; generate a model of the captured motion based on the image data; modify at least a portion of a size of the model to constrain the model to an avatar; and render the avatar using the modified model.