Lightmapping takes long time

When I use the Lightmapping tool to bake textures, it takes a long time. Is there any way to use like a renderfarm to do this from Unity? I don't really want to have to bake textures in 3D Max.

You may try to decrease the quality of the lightmap by reducing Resolution in Lightmapping->Bake Settings. Default value (50) sometimes needs much time for large objects.