Emissive static lighting looks noisy?

I have r.VXGI.AmbientOcclusionMode set to 1, but it looks the same set to 0. I’m wondering what is causing this noisy/dirty lighting? I have 3 spheres using emissive materials and have ‘Use Emissive for Static Lighting’ enabled.

Though I haven’t tried using emissive only for lighting, this looks like a lightmap resolution problem. Have you tried baking at a production quality or looking at the scene with the view set to show Lightmap Density?

Hi!

Are you using portals with your emissive spheres?
You might be using compressed lightmaps…
And I’m kind of sure that your ILQ is set to too low…