How to create well optimised office-style ceiling lights?

[No_idea_20]

I’m making a game that takes place inside an office, the main light source of which will be ceiling tile lights. The problems I’m having are that while having a rect light for each light looks perfect, it has a significant affect on the performance (100fps down to 25).

When I try the obvious and just set the lights and other non-moving objects in the scene to static and bake the lighting, I either get a message in the editor saying ERROR: X OBJECTS NEED TO BE REBAKED or the baked lighting just doesn’t show up???
In the below picture you can see the lighting working well, but it doesn’t seem to be baked and only gives a stable fps on a small scale (4 lights) and not with the whole building.

I also tried emissive lights too, but they’re way too noisy and just don’t look good at all (although seem decent for performance)

Any tips for how I could fix or get around this problem?
Any help would be appreciated!

[comlys (Shaun Comly)]

You can try GPU Light baking. Keep an eye on some announcements of new features at UE Fest. There will be something there you will be very interested in

[No_idea_20]

Wow, that really helped! I’d never even heard of the GPU Lightmass plugin before but it’ll definitely come in handy for some of my other projects too. Thanks again for the quick reply!