Wizaid has announced the release of the Visor SDK, a visibility culling tool targeted for video games and simulation. It allows the PVS method to be used with large scale, high complexity 3D models. As a result of a long research period its algorithms are fast and accurate. In Visor the effectiveness of visibility computations is decoupled from the input model complexity. A proper culling accuracy can be chosen, allowing trade-off between hardware resources and accuracy. Visor was made to be a general purpose visibility tool. It may be used with architectural and terrain scenes. Visor's run-time API is around 200 lines of C code, making it highly portable. The memory requirements are small enough even for handheld gaming devices. Interested parties can visit Visor's official website to learn more about the tool, as well as to request an evaluation copy.