3 Machines (every has a GPU:) in 1st stage are making “photons-something” (orange color) with CPU, next with GPU baking the maps ( blue color ).
One machine was to slow to finish photons-sth so did not even bake any map.
But time of whole process is the same with single machine and all machines in Swarm network. Maybe this scene is too small with maps count and size to use all machines properly.
I will check it with oversized lightmaps for every object in the scene (1024px) and we will see.