1. A method for graphics processing with a graphics processing system having a graphics processing unit coupled to a display device, comprising: receiving data representing one or more vertices for a scene in a virtual space; performing primitive assembly on the vertices to compute projections of the vertices from virtual space onto a viewport of the scene in a screen space of the display device containing a plurality of pixels, the plurality of pixels of the display device being subdivided into a plurality of subsections; for each primitive that has been converted to screen space coordinates, determining which pixels of the plurality of pixels are part of each primitive; performing coarse rasterization for each primitive to determine which subsection or subsections the primitive overlaps; receiving metadata associated with the subsection a primitive overlaps, wherein the metadata is associated with the screen, wherein the metadata determines a pixel resolution for the subsection, wherein the pixel resolution is a number of active pixels per unit area of the screen for the subsection; and using the metadata in processing pixels for the subsection to generate final pixel values for the viewport of the scene that is displayed on the display device in such a way that parts of the scene in two different subsections have different pixel resolution, wherein using the metadata in processing pixels for the subsection does not change pixel data stored in a memory.