Generating image data for a room image, including: generating at least one planar layer in depth for a first room image; generating at least one wall layer for a wall in the first room image; creating a second room image by duplicating one or more of the at least one planar layer for the first room image and duplicating one of more of the at least one wall layer for the first room image, and modifying the at least one duplicate planar layer and the at least one duplicate wall layer; and applying the first room image and the second room image as patterns to a surface of a building image.