Light/White pixel flickering on tiles

Cesium for Unreal
6

Hi @MetaMagnus,

I’m so sorry about the misunderstanding. Because I didn’t expand those images, I genuinely thought it was dust on my computer screen, and the only bright spots I could see were the gaps in the tiles. :sweat_smile:

I found the source of the real issue. It has to do with the “DitherFade” material layer in the default Cesium material, which is associated with LOD transitions. I don’t know if you’re using LOD transitions for your use case, but you can remove this effect if you aren’t by doing the following:

  1. In the Content Browser, go to Plugins > Cesium for Unreal Content > Materials > Instances
  2. Copy MI_CesiumThreeOverlaysAndClipping into your project. You might want to rename it so you can distinguish it from the default material in the plugin.
  3. Open it and delete the material layer labeled “DitherFade”.
    image
    image1689×1568 177 KB
  4. Save, then assign this in the Material slot of the tileset.
    image
    image1651×667 72 KB

This will make the flickering go away. Unfortunately, I do see this effect even with Enable LOD Transitions set to true. It seems like something goes wrong when there isn’t an LOD to transition to. I’ve written a Github issue so we can look deeper.

I hope this workaround is sufficient for now! Please let us know if there’s anything else I missed, or any concerns or questions. Thank you for reporting this issue :smile:

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