sprites could be stored in a sprite sheet

[7yl4r]

rather than having each sprite collection in a folder, the sprites could be read from a sprite sheet containing all sprites for a given animation, avatar state, or avatar body part and retrieved by location in the sheet.

This may be difficult to code, but may improve the performance of the app by allowing the app to load images less frequently.

However, this may also cause the app to use more memory, leading to a difficulty staying under the maximum memory usage requirements for live wallpapers.

[7yl4r]

a good overview of implementation of this is here

and another here