As you can see, I've been running a few Poser renders - since being inspired by Danae's Rio, I've been reading up on exactly what Ambient Occlusion involves, and what the shader tree actually does.
An example is Ghost, the car render - I liked the look of the Ratracer Luxury Office (as a kind of posh showroom), but the surfaces didn't look crisp enough for me, so I read up on exactly what makes reflections, highlights and so on, and tweaked the textures a bit - hopefully the marble now looks a little sharper than the original textures. Happy to share how if anyone wants, but too lazy to describe otherwise

Cheers
Al/Voc