A processor generates Z-cull information for tiles and groups of tiles. In one embodiment the processor includes an on-chip cache to coalesce Z information for tiles to identify occluded tiles. In a coprocessor embodiment, the processor provides Z-culling information to a graphics processor....http://www.google.fr/patents/US7450120?utm_source=gb-gplus-shareBrevet US7450120 - Apparatus, system, and method for Z-culling
