Thanks for the in depth reply. The main issue I have with DFAO and SSR/SSGI is that you don’t get the same quality of bounced lighting and colour bleeding that you get with lightmass. My game has quite minimalist interiors so the quality of the indirect lighting is paramount. I have found it is possible to swap between baked lighting and lumen in game using console commands but it is a bit buggy and of course the baked lighting often looks quite different to the lumen version.
I am toying with the idea of just having duplicate levels, one with baked lighting and one using lumen although will be a bit more of a pain for multiplayer…