Building Builder lets you create a variety of Low-poly buildings from a defined list of settings. Each building is created by a collection of options that can easy be changed or set to use a random set of values.
When you have a building or group of buildings selected you should see all the randomization options in the inspector. This area can be used to help define the look of the house when you press the randomize building options.If you don't want an option to be randomized just un-tick the option.
You can re-randomise the arrangement of textures by using the “Randomize Textures” button. You can also edit them manually by changing the letters in the Textures Details section. Here each texture used is represented with a letter.W Wall
D Door
G Window (Glass)
With the release of Version 1.2 (June 2017) you can now use the building with Baked lighting. Just enable the new Baked Lighting option and adjust the unwrapping options.The Unwrapping options are the current default import options on normal mesh import.