MNG (Multiple-image Network Graphics) is a raster graphics format for animated images. It is closely related to the PNG (Portable Network Graphics) format and shares many of its features, including lossless compression and support for transparency. MNG was designed as an animation format to complement PNG, which is primarily intended for static images. MNG supports a variety of animation techniques, including looping, layering, and delta frames (where only the differences between frames are stored). It also supports multiple images within a single file, allowing for complex animations and interactive graphics. While MNG offered advanced features, it never achieved widespread adoption, largely due to its complexity and the emergence of simpler animation formats like GIF and animated PNG (APNG). Support for MNG is limited in modern web browsers and image viewers.