Yes, yes students of Carrara. Mastering the shader in Carrara will much power bring you. Yes, much power. This knowledge comes only by exploring the heart of the shader tree; Cannot be found in free shaders - only a dim shadow of it will you see. Immerse yourself you must. But to be truly free, mastering the sacred three must you: Modeling, lighting and texturing. Only then will you be one with your imagination. :-D