Are image atlases available in renpy?

[synedraacus]

Does renpy have any support for image atlases? Our current project has a lot of little UI elements that are now stored as separate files, and the images directory is clogged. Files like 'images/Button{0}state{1}style{2}.jpg' are all over the place and it'd be nice to tidy up a bit. What I want is to have something like 'Buttons.jpg' and just call them in screen definitions via something like ButtonAtlas.get_segment(xpos, ypos, xsize, ysize) like I can in eg kivy or pretty much every other game engine. If it's relevant, those are not really buttons or scrollbars, but the elements of CDD-based interface, so they are only defined and used in pure Python, not screen language.
If no direct support is available, what Python libraries should I use and what should I do about the distribution? It'd not be great at all to discover that player cannot use the game because they don't have pillow installed on their system.

[PyTom]

Ren'Py automatically atlases imagemaps. We don't have direct support for them otherwise, but you could build something using im.Crop.

[synedraacus]

Thank you PyTom. I guess I'll work from there.