Anti-aliasing question

We want to use FX anti aliasing for half of the screen, and temporal AA for the other half of the screen, is that possible? If so, can you point me to a direction?

Hello SongOfDeath,

Anti-Aliasing (AA) refers to the smoothing of aliased, or jagged, lines when displayed on a computer monitor. This is a correction derived from what the camera can see on the post processing pass. It is not possible to filter out and assign half of a screen to render FX and the other Temporal. There are ways to use the ‘use custom depth mask’ feature from a HighResScreenshot. This will give you an alpha but is a purely binary image with no aliased greyscale values. So the RGB values are aliased but not the alpha. This way is fairly useless for compositing/postprocessing. This is also a fairly inefficient method as the masking happens after the Anti-Aliasing is done. This may be useful for a single image/screenshot but not for gameplay.

thanks, answer in 7 hours, I love Unreal folk, thanks again for all your efforts, we love you guys!

It is possibilities.

It depends on how you implement the anti-aliasing. Mostly the lower render may be a status machine, so you have to cut the render into two part, and you apply FXAA in the first part, and apply TAA in the second part, and do composition.

It may need a very long and hard hand doing, I don’t have try it; but in theory, yes, you can do it.