A shader node setup for generating parallax mapped 3D interiors behind flat window surfaces. The tool works with both UV and generated coordinates, allowing users to add lightweight 3D rooms to buildings without additional geometry overhead. It features adjustable and randomizable room dimensions, support for cubemaps and tiled textures, and three additional depth layers for inserting furniture or window shades. The node group also includes a precalculated light pass, ambient occlusion controls, and an emulated sun shadow system.