I just re-read what is said on the site about Deeper. It adds Normal Map as a shader function (in the bump map channel), and since it behaves like an ordinary texture map it can be tiled. It also appears to add some new way of rendering the normal map (Carrara already does this -- not sure what is being added here). Also read up on Architools, which if properly customizable could be a great aid in some projects I've been considering.