GPU Lightmass always shows water body component as unbuilt light interaction

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Using GPU lightmass in 5.6.1. Its fast and looks good. Only problem is after building it always shows the water body as unbuilt object.

DumpUnbuiltLightIteractions always reveals:

  • Primitives with unbuilt interactions: 1
  • Primitive WaterBodyInfoMeshComponent

It doesn’t make sense that the water is even considered. Is there a way to keep it out of the build? Using a standard engine water body. No water plugins or anything weird.

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Everything set to Movable will be ignored by the lightbuilds. You might however get different problems or performance drops when doing this.

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Mobility set to Movable on both the WaterBodyOcean and its Spline component. No luck. Still shows as unbuilt. :thinking:

I do notice that if I move lights very far away from the water, like at least triple their radius, then it doesn’t trigger the unbuilt warning. But that’s not really an option. :expressionless_face: