When I Build the lightmaps, even when simply building it from the editor Build- > Build Lighting Only, UE4 wants to save the corresponding .umap files, which in turn will require a checkout in P4, causing other people in the team to checkin each time we need to build our maps.
The corresponding _BuiltData.uasset file is also produced, so why the need to modify and change the .umap file too. By the way, if I ignore saving .umap, but keep _BuildData.uasset around, I still see the typical red screen message LIGHTING NEEDS TO BE REBUILT.
I think this is not acceptable and I am sure we don’t have the right settings somewhere, or we are doing something wrong. Can anyone please suggest a solution or workaround for this.