Hashed alpha testing
Chris Wyman, Morgan McGuire · 2017
Renderers apply alpha testing to mask out complex silhouettes using alpha textures on simple proxy geometry. While widely used, alpha testing has a long-standing problem that is underreported in the literature, but observable in commercial games: geometry can entirely disappear as alpha mapped polygons recede with distance. As foveated rendering for virtual reality spreads this problem worsens, as peripheral minification and prefilitering also cause this problem for nearby objects.