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 outlines of each of two or more objects in the same single digital image to generate data representing two or more two-dimensional polygon that encompass the objects; b) separating first and second portions of the single digital image bounded by the two or more two-dimensional polygons from a remaining portion; and c) using the first portion of the image as an avatar in the simulated environment and using the second portion as a terrain feature in the simulated environment by determining which of the first and second portions is closest to a to of the digital image and using that portion as the avatar and determining which of the first and second portions has a smaller two-dimensional area and using that portion as the avatar, whereby the avatar and the terrain feature are created from the same single digital image.