What you get when buying the Living Doll-resource is a carefully made set of psd-files. They give you the option to create jpgs from this set that are only compressed once: When you save them to the textures-folder that goes with your character.
All additional features are kept on seperate layers with a transparent background. The highly detailed basic parts do not contain lips, brows, veins, navel and so on. You can decide for your preferred set and add it to the base – or give your creation even more personality by adding your own ideas – and this system makes the little tricks like colorshifting a detail or altering it’s saturation easy and fun.