Hi everyone
I’m working on an archviz project and i got a problem with some thin meshes (Laths)
As soon as i walk away from them they start doing weird flickering
Can anyone help please?
Probably a combination of aliasing and Z-fighting. The realtime anti-aliasing solutions can’t produce perfect edges so something like that where they are thin vertical lines close together will have some issues. Besides that, there’s a limited range of depth which has to extend to whatever is furthest from the camera, when you zoom out you can end up with surfaces that were very close to each other at the same depth level and so it causes artifacts where it doesn’t know which surface to show.
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So in the end it will always be some kind of problem with that kind of mesh frequency as soon as i zoom out ?
Hi,
Unfortunately, yes. This is a very big issue with many project when using thin meshes (Even more with virtual production)
You might want to take a look at your Temporal AA samples, this link might help you: https://docs.unrealengine.com/5.1/en-US/anti-aliasing-and-upscaling-in-unreal-engine/
Hope this help 
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There’s a few things you can try.
Use make sure screen percentage is set to at least 100%, could crank it up to 200% if you got beefy hardware and don’t care about the frame rate.
Try creating a LOD for those meshes when viewed at a distance. You might try replacing the meshes with just planes, or using a masked texture to represent the slats. Or both depending on the distance.
Try different types of AA, TAA, DLSS, TSR, FSR, etc might handle it differently or better. Often it’s situational but generally, DLSS should be best, followed by TSR/FSR, then TAA.
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Yeah, I imagine the main solution would be an LOD that replaces it with something different once you get to that kind of distance.
I know i am very very late on the reply for the post, but i just had the same issue on same type of geometry, and after a lot of reading and R&D, i have it finally figured out that any of the anti-aliasing in unreal engine 5.5 at current state is not able to handle thin geometries from distance.
So the solution for it i found is that I had to download “DLSS”, which is an external plugin from Nvidia.
Unfortunately this Plugin is only available for Nvidia cards so AMD Users might need to find some other workarounds.
DLSS pretty much solved my problems of thin geometry flickering.