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Building lightmaps under LAN by more than one PC

Hi~

I’m working on some very large game scenes in UE4.
It costs a lot of time(like a whole day) when I build lightmaps for those scenes.

I recall that UE4 can support this:

Linking several PCs under LAN connection, building lightmaps for one scene by all
the connected PCs at the same time, then it could build extremely faster than using only one PC.

Is there any document that could tell me how to make it?

UDK/UE4 uses Swarm for that… maybe this link will help https://answers.unrealengine.com/questions/27550/swarm-what-is-it-and-how-to-use-it.html

Also consider whether your game is too big to use lightmaps–open world games for example don’t use baked lighting since there’s too much that would have to be rendered.

Swarm did work , so many thanks!!!