Aspects of this disclosure are directed to updating a low resolution buffer during a binning pass of an image surface by a graphics processing unit (GPU). For example, during the binning pass of the image surface, the GPU may divide the image surface into a plurality of blocks of surface pixels of the image surface. The GPU may then store a surface identifier of the image surface within storage locations of the low resolution buffer to correspond to each of the blocks of the surface pixels of the image surface.