Does UE5 Lumen disable SSAO?

I read the documentation here: Lumen Global Illumination and Reflections | Unreal Engine Documentation

As the doc says: ’ Lumen Global Illumination replaces Screen Space Global Illumination (SSGI) and Distance Field Ambient Occlusion (DFAO). Lumen Reflections replace Unreal Engine 4’s Screen Space Reflections.’

I understand that Lumen could be compatible with SSAO then. But I’m seeing if I activate Lumen as GI method, the AO buffer turns totally white. Is it a bug?
Are there any kind of AO we can use in combination with Lumen GI?


I would like a response to this question too. Although, in my case, I see

  • pure white for the AO buffer (despite messing with all post process settings for AO)
  • some shadowing in Show → Visualize → Distance Field Ambient Occlusion, which does NOT seem to show in the Lit scene