Maximum PC: The future of AMD's Mantle is up in the air since AMD recently told developers to focus on DirectX 12 instead. However, it doesn't appear as though AMD is ready to completely dismantle its API, which will have a future in Vulkan, the next version of the OpenGL API. You may recall that Oxide Games was a big proponent of Mantle -- check out our interview from a year ago. How does Oxide feel today? To find out, we headed to Oxide's booth at GDC and talked about a number of things.