I’m having trouble fixing the ghosting that’s appearing on my character in Unreal. I’m using the latest version of Unreal and I can’t seem to solve it. Does anyone have any idea what might be causing this?
Hey there @JaviM23! Welcome to the community! This looks a bit like temporal ghosting stemming from Lumen, assuming you have it enabled. This is an unfortunate side-effect of Lumen interacting with a temporal anti aliasing method. This thread goes over some possible fixes aside from disabling lumen or changing to another AA method. This includes the command r.Lumen.ScreenProbeGather.ScreenTraces 0, though they were mostly leaning towards real time instead of rendered so you may see different outcomes.
Hope this helps!
Thank you for replying. I have already visited that and many other guides, and none of them have solved the problem; I’m still in the same situation. I’m starting to believe that it’s not related to the render settings, and that it has to do with the Alembic (abc) or something in the scene, but I can’t manage to fix it.
It most certainly looks like temporal AA artifacts, this is a common thing with anything that uses temporal AA or TSR as it uses previous frames and is not a UE5 issue, it’s the AA solution itself. Try a different Anti-aliasing solution or upscaling solution like FXAA or DLSS but they has it’s drawbacks as well.
Does the issue occur without any AA or a non-temporal AA?
The problem occurs in both, with and without
I just tryed all diferent type of AA and still have this issue
It’s any AA that has a temporal component to it, DLSS and can do it yes depends on the preset you use, FXAA and MSAA don’t but you can’t use MSAA in the default renderer only works with forward rendering. Maybe switch to forward rendering but you’ll lose certain rendering features. You also might want to switch to DX11 as MSAA works better with it.
Edit: Sorry quoted the wrong post.
Interesting, it shouldn’t have anything to do with the import. The ghosting does seem temporal in nature. Does disabling Lumen have any affect (with AA also off as a control)?
No, I tried turning off Lumen, but it doesn’t affect anything.
Without any AA, Lumen, or post processing, there’s still ghosting? That’s interesting. The issue does seem temporal in nature. In your Movie Render Queue, try setting your Temporal Sample Count in your Anti-Aliasing to 1, it may not stop it, but it may change it. This could shed some light on the issue.
Ensure the velocity is not corrupted in the file. Are you trying to render a stop-motion type look? We often see this when people want to animate on 2 seconds. But the only time I’ve seen that with anim on 1s is when the velocity information is messed up.
I would start just shutting things off like Lumen, TSR, Shadows, PP fx, etc.. to fine what system is having the issue and go from there. Visually, I would guess Lumen or AO.
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