1. A computing device, comprising: a logic subsystem; and a data-holding subsystem comprising instructions stored thereon that are executable by the logic subsystem to: receive a depth image representing an observed scene comprising a user; detect a representation of the user in the depth image; determine an adjusted body model based on a comparison between an initial body model and the representation of the user; output to a display device a representation of the adjusted body model; and output to the display device a time-varying representation of the adjusted body model based on a comparison between the adjusted body model and one or more previous instances of the adjusted body model.