A barn that transform from a regular farm barn to a gentrified house.
To add windows to the barn there is a folder in the Materials library called "Barn Add Windows". Then add sills or bay window to barn. This Materials folder also includes mats for hiding portions of the roof for adding the gables. These materials make that part of the barn transparent. The light will not shine through unless these areas are transparent.
To remove windows from barn use the full barn mat in the main Material folder. There are two colors of lights, one yellow and one a bluish violet.