Lumen reflections close-up fidelity issue

Experiencing issues (5.03, 5.1) with Lumen reflections up close. Any way to improve the jagged edges?

Thanks!
Andrew

I believe that is an aliasing issue, alas. Depending on your lumen CVars, you might be able to filter it away, but if it’s translucent, all denoising is disabled to cut down on cost. Apologies.

It’s not translucent, just reflective material. Couldn’t get the denoising to work while editing lumen CVars. When I enable visualize traces in probe gather it somewhat aligns to the steps in the reflection. Could it be related?

Thanks!
Andrew

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I see. To work in order, the first thing you’ll want to do is to take a look at your material properties, especially your shading model. Lumen can have strange and unpredictable behaviors depending on the exact settings of your material, so if it’s anything other than a default lit set to opaque, there may be some strangeness.

Second, your post-process volume settings will matter. Your reflections look to be high enough resolution, so that noise/aliasing is most likely derived from your lumen scene, or potentially your screen resolution.

Third, the visualizetraces tool you are using actually only applies to lumen’s screenprobegather, which to my knowledge only solves for diffuse lighting. In this view it’s kind of hard to tell, but do you have a screenshot of that that surface is actually meant to be reflecting?

Did you ever figure this out? Having the same issue with glass/translucent material reflections. I have tried everything I can think of but still getting jaggy looking reflections.

This looks like an issue with not using High Quality Tangent Basis or not having High Precision Normals in the Gbuffer for project settings.


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Thanks, the High Precision Gbuffer fixed it for me :slight_smile: