1. A computer-implemented method for rendering a graphics image, the method comprising: identifying a first set of stencil samples that reside within a pixel, wherein each stencil sample in the first set of stencil samples is associated with one or more state values; determining coverage of the first set of stencil samples relative to a graphics primitive; grouping the first set of stencil samples into a set of sample groups, wherein the number of sample groups included in the set of sample groups is less than the number of samples included in the first set of stencil samples; and determining a color value for each sample group included in the set of sample groups based on the coverage of the first set of stencil samples relative to the graphics primitive and a color value associated with the graphics primitive.