Decals is a great way to improve your renderings and save on modeling.
Use the Place Decals tool to place an image on the surface of an object, for example, a logo a on a building. Other examples would be to place a painting in a room or a billboard.
You can insert a decal by going to: Insert tab > Decal drop-down > Decal Types.
Decals can be created from image types like: BMP, JPG, JPEG and PNG. They can place them in a 2D view or a 3D Orthographic view. Just make sure that there is an available flat or cylindrical surface on which you can place the decal on. Once a decal has been inserted, you can move, resize, rotate or change the properties of a decal.