Well, it's been quite a while since I've updated my last critique-this-shader thread, so I think the improvements that have taken place since then merit a new "version 3.0" thread.  This is the latest in my ongoing quest for optimal photo-realism in P8, and your feedback would be very helpful!  To start things off, here's an at-a-glance comparison of an unshaded and shaded Vittorio chest.  There are four spotlights (two rim, one fill, and one main), each with BB's inverse square falloff shader applied, and IDL is enabled.  Thoughts?