1. A method, comprising: performing, by one or more computing devices: rendering an image at a first resolution, wherein a computer-generated three-dimensional model (3D) model is rendered as one layer of a plurality of layers, and wherein another one or more of the layers includes two-dimensional (2D) artwork for the image separate from the 3D model; in response to a manipulation of the 3D model, rendering the one layer from the 3D model at a second resolution that is lower than the first resolution and as a single image tile; and subsequent to the manipulation the 3D model, rendering the one layer from the 3D model at the first resolution as a plurality of image tiles.