This is something that has been bothering me for as long as I’ve used the engine now and I have searched high and low for a way of improving/fixing it for years & have tried many things including forward rendering etc, but I still have not found a good solution that fixes it. How do I use Temporal AA(Antialiasing) without it flickering/moving around the screen even when nothing in the scene is even moving including the character? And if there is truly no way to do this, why would anyone even want to use Temporal AA in the first place? And if there is no way to do this, then how do I stop all the jagged movement when using FXAA instead of Temporal AA? The jagged movement is so bad for my specific project that no solution seems to be available. Temporal AA is great for my project when the character is moving, and FXAA is great for my project when the character is not moving, it would be nice to somehow turn on FXAA when a player’s character is not moving and turn on Temporal AA when a player’s character is moving.
Unfortunately, the post processing effect is not the cause of this. I’ve recorded an example of the problem which I uploaded to an image host as a gif. This problem happens on any level, in any engine version, with any lighting applied, on any operating system, without any post processing effects applied. This is when Temporal AA is turned on. You’ll see I tried to “circle” the areas with the cursor where it can be seen flickering. Nothing is supposed to be moving in this scene except for the mouse cursor, nor is the camera moving. I’ve been baffled as to why this is happening for a long time, but I’m sure someone will know once they see it. Here’s the link to it as I’m not able to upload it on here unfortunately. https://s8.gifyu.com/images/TemporalAA.gif
Here is a Brand New Unedited Project, using the First Person Template map in 4.25.4, in which I’ve only placed a few pieces from the starter content to showcase that this is happening no matter what project/content I use (I haven’t imported any content into this project or changed any project settings), again I’ve circled the areas with the mouse cursor if they weren’t obvious enough. https://s8.gifyu.com/images/TemporalAADefault.gif