1. A method of rendering an image having a plurality of objects, comprising: generating an adjusted z-position by randomly adjusting the original z-position of an object over a series of samples; sorting said plurality of objects in a sample based on said adjusted z-position of each object of said plurality of objects; and rendering said plurality of objects in a sample based on the sorted order for the sample using said adjusted z-position but at the original z-position to generate a resulting image.