That's the maximum number of sprites you may load with the lib I'm working on.
I started this a while back when Foxi4 made that 3D Sprites example then after studying how Foxi4 made his Nitro Sprites Loading lib I imitated the process for loading 3D Sprites.
I'll release the lib and examples to go with it soon.
I don't know why I'm unable to render the frames correctly in the program...