maybe try using texture arrays, I have been using them on mobile-VR and they work like a breeze, not to mention they allow you to skip the dreaded atlassing step. you will need amplify shader editor to make custom shaders with array support.
what do you mean about textura array? a collection of cartoony and well sized texture one by one put together like a texture atlasing? is the same technique as texture atlasing or similar? use photoshop for example to create the collection of these ? thx for the info.