C

FXAA

The FXAA effect applies fast approximate anti-aliasing to the layer. FXAA is a high-speed anti-aliasing technique that removes some of the artifacts from the image without impacting performance as heavily as super-sampling would. In the image below, the effect is applied in the right picture.

Usage

Pros	Cons
Easy fix for many aliasing problems. Works with moving images (unlike Progressive Anti-Aliasing).	Can blur and distort fine text details. As a screen-space heuristic technique, it can sometimes leave sharp edges that ideally would be anti-aliased.

Available under certain Qt licenses.
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