Use GIF files as textures!
DEMO & MORE INFO

Features:
1. Works with opaque, transparent and animated gifs.
2. Create atlas.
3. Force the entire atlas to be resized to your desired size.
4. Async loading GIF and generate atlas without affecting the main UI thread.
5. Support remote GIF caching, so it be loaded faster next time.

Simple implementation that is artist and programmer friendly:
1. Add a Gif file to your project.
2. Add a component to your game object
3. Set the Gif file name or url on the inspector.

You can also use it more flexibly by access the dll directly if you know scripting.

Tested on iOS, Android, WebGL, Windows and Mac.