1. In a system configured to facilitate interaction with a simulated environment, a computer-implemented method for generating an asset for the simulated environment, the method comprising: a) automatically digitally tracing an outline of an object in a digital image to generate data representing a two-dimensional polygon that encompasses the object without relying on further input from a user to trace the outline; b) separating a portion of an image bounded by the two-dimensional polygon from a remaining portion of the digital image; and c) associating the portion of the image bounded by the two-dimensional polygon with an asset in the simulated environment.