US Patent 11170566 Multi-rate shading using replayed screen space tiles

One aspect of the disclosure provides a method for rendering an image. The method includes: placing primitives of the image in a screen space; binning the primitives into tiles of the screen space that the primitives touch; and rasterizing the tiles. The aforementioned rasterizing includes shading a subset of the primitives binned to one of the tiles over multiple passes at multiple shading rates, each of the shading rates is based at least on a frequency at which a color being shaded at each pass changes across the screen space, and the subset of the primitives are cached in an on-chip memory of a processor rendering the image between the passes.