[FEATURE REQUEST] UE 5.8 Spotlights + Megalights + Skeletal Meshes shadow issue

Development Programming & Scripting
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Hello,

I noticed a shadow issue in UE 5.8 involving spotlights, MegaLights, and skeletal meshes when Global Illumination is set to Low or Medium.

I tested it in my custom project, an empty project, and a default UE project.

What happens:

The shadows of any skeletal mesh (UE4, UE5, Mixamo, or custom) are broken and do not render correctly. They look partially translucent.

How to reproduce it in any project:

  1. Enable MegaLights
  2. Add a Spotlight to your scene with Cast Shadows enabled
  3. Add any Skeletal Mesh to your scene with Cast Shadows enabled
  4. Set Global Illumination to Low or Medium
  5. It doesn’t matter whether you use Lumen or not. The shadows will still be broken
  6. The issue is visible in the viewport, in Standalone mode, and in a packaged project

I didn’t find anything online about this issue, and I have only performed these tests on my own computer. So, please let me know if you can reproduce the same issue or if you know of a solution.

If this issue is reproducible by others, I hope this post will help get it fixed.

Thank you very much for your time and understanding.