**Images (of movie clips) used as background in the 3D viewport are primarily meant to be used as reference and will not render**. Here are a couple of alternatives: - **Using the compositor** Add an Input>Movie Clip node, and use an alpha over node to compose the render layers over it. [![enter image description here][1]][1] For single images use an Input>Image node. [![enter image description here][2]][2] If youare using cycles make sure that you enable Film Transparent, so that the rendered layers render with a transparent background: [![enter image description here][3]][3] - **Without the compositor** Without using additional geometry or compositing, you can use the image as background for the world. Set the Texture coordinates to Window. [![enter image description here][4]][4] [4]: https://i.sstatic.net/blzHI.png [1]: https://i.sstatic.net/oEUTc.png [2]: https://i.sstatic.net/egSQs.png [3]: https://i.sstatic.net/MOnlM.png