Temporal Anti-Aliasing

In this chapter, we will expand on a concept touched on in the previous one when we talked about temporal reprojection. One of the most common ways to improve image quality is to sample more data (super-sampling) and filter it down to the needed sampling frequency.

The primary technique used in rendering is Multi-Sample Anti-Aliasing, or MSAA. Another technique used for super-sampling is temporal super-sampling or using the samples from two or more frames to reconstruct a higher-quality image.

In the Volumetric Fog technique, a similar approach is used to remove banding given by the low resolution of the Volume Texture in a very effective way. We will see how we can achieve better image quality using Temporal Anti-Aliasing (TAA).

This technique has become widely used in recent years after more and more games started using Deferred Rendering at their core and because of the difficulty in applying MSAA on it. There were various attempts to make MSAA and...