I'm still finishing up the final details, but you will be able to create Procedural Textures (writing custom GLSL shaders to generate them) for Cave now.

The use cases for this are endless and they can even be Dynamic (updated every frame for you). A good example is Dynamic Skybox, Water Texture, etc. :D

The Procedural Textures works like any other Texture: you can assign then to materials, pass as shader uniforms, etc.