ABSTRACT
In this chapter, we discuss geometric postprocess antialiasing (GPAA) [Persson 11a], which is an alternative approach that operates on an aliased image and applies the antialiasing post-step using geometry information provided directly by the rendering engine. This results in a very accurate smoothing that has none of the temporal aliasing problems seen in MLAA or the super-resolution buffers needed for SRAA or the traditional MSAA. Additionally, we will discuss geometry buffer antialiasing (GBAA) [Persson 11b], which is based on a similar idea, but is implemented by storing geometry information to an additional buffer. This technique is expected to scale better with dense geometry and provides additional benefits, such as the ability to antialias alpha-tested edges.
