Abstract: A method for computer graphics rendering system uses a silhouette map containing boundary position information that is used to reconstruct precise boundaries in the rendered image, even under high magnification. In one embodiment the silhouette map is used together with a depth map to precisely render the edges of shadows. In another embodiment, the silhouette map is used together with a bitmap texture to precisely render the borders between differently colored regions of the bitmap. The technique may be implemented in software, on programmable graphics hardware in real-time, or with custom hardware.