This was hacked together on one afternoon. It is not well tested or production ready.
All scripts in the animation_baking directory are tool scripts, this way you can
also use them in editor scripts if you want to bake the animations in advance.
A demo that bakes the textures at runtime can be found in demo.gd. Please be aware
that running the project can take several seconds before the window even appears
since the backing blocks the main process.