If you are looking for a beautiful and interesting iPad background wallpaper, you can download 3D graphics for free. There are many high-quality 3D wallpapers available to download, so you can use them on your desktop, tablet, or mobile device. Here are some tips to make your wallpaper look great and last for a long time. First, you should know how to choose a 3D image. A high-quality image is at least 1920 x 1080 pixels.