1. A system disposed to implement a learning rule in a three-dimensional (3D) environment, the system comprising: a renderer disposed to generate a plurality of two-dimensional (2D) images based at least partly on a set of 3D scenes; a computational element disposed to generate a set of appearance features based at least partly on at least one 2D image from among the plurality of 2D images; and an attribute classifier disposed to generate at least one set of learned features based at least partly on each set of appearance features and to generate a set of estimated scene features based at least partly on each set of learned features.