AboutSauRayTM is a purely server-side anti-wallhack product by TooMuchVoltage Software Inc. mainly targetting competitive gaming. It requires hardware raytracing GPUs on game servers though it can also be customized for software GPU raytracing problems of the same nature. It utilizes a specially crafted algorithm that allows for accurately determining pairwise visibility between players given current GPU ray budgets and has extensible mechanisms to account for various client-side dynamic visibility problems at low virtual frusta resolutions. For more information please visit the F.A.Q. SauRayTM is now fully open source under a commercial license and can now be found here.