The Zero Brush bake system has been completely overhauled. You can now instantly bake one or multiple objects (for both Blender Render or Cycles) individually, or to a single map if preferred. There are no stipulations or requirements for baking to one map or individual maps as there were in the previous system.
The new system also lets you select from every available bake option in both Blender Render and Cycles and get delivered instant results. Among other big changes in the new bake system, you can now bake normal maps by selecting a high-poly object then shift selecting the low poly object you wish to bake the detail too in addition to the standard Zero Brush instant normal map baking. Learn more in the video below.