This ProBuilder Tutorial will show you how I managed to bring "DM-Warren" down from 1000-3000 drawcalls, to 3-5 drawcalls. This tutorial applies to all map making in Unity, not just with ProBuilder, and the steps are fairly simple:
-Use as few lightmaps as possible (no need to sacrifice quality, see link at bottom)
-Take the time to build good occlusion data- huge gains here, too
-Use Forward Rendering if possible. This isn't in the tutorial, because it's a default setting that almost never gets changed unless you really know what you are doing.
Link to the custom Lightmap Size script, which is absolutly essential to optimizing:
http://answers.unity3d.com/questions/36036/how-can-i-increase-the-texture-size-of-the-lightma.html
Thanks for watching!
ProBuilder is a tool for building, editing, and texturing geometry in Unity 3D:
http://www.sixbysevenstudio.com/probuilder
