Exact antialiasing of textured terrain models

We introduce a fast area-sampling antialiasing technique for textured terrain models. We scan the model in image order, averaging the pixel footprint values. The technique samples all, but only, the visible parts. It improves previous texture mapping methods that ignore self-occluded footprints. It is superior to super-sampling. The image quality is assessed in both spatial and temporal domains. The good precision of the sampling process in the spatial domain provides an alias-free temporal domain. The low computational cost of the rendering technique and its high-quality filtering in the spatio-temporal domain offer a tool for real-time rendering of discrete terrain models.