1. A system for validating the output of an updated graphics rendering engine, the system comprising: a first and second computer, wherein said first and second computing devices are configured such that said second computer includes an updated graphics rendering engine, wherein said first and second computers are configured to execute test instructions that cause graphic information to be rendered on said first and second computers, and wherein said first and second computers are configured to respond to at least one sample request during the execution of the set of test instructions by retrieving the currently rendered data on the computer as a rendered sample; and a master computer configured to obtain the rendered samples of said first and second computing devices, compare the corresponding rendered samples of said first and second computers to determine whether there are differences between corresponding rendered samples, and if there are differences, report those differences.