Temporal AA

This console command will adjust the quality of whichever Anti-Aliasing method you are using (FXAA or Temporal AA). For either Anti-Aliasing method, a value of 1 will disable the effect.

Info About the Upscaling:

https://docs.unrealengine.com/5.1/en-US/screen-percentage-with-temporal-upscale-in-unreal-engine/