Vue 7 Infinite
or Lightwave
or Maxwell Renderer (But, getting Poser folk to work in maxwell studio will take a lot of work!)

check my gallery for Maxwell (model work) and Vue renders (scenes though I don't go for photo realism, I heavily stylize my scenes in photoshop)

or better yet, but Vue 7,5 Xstream and Lightwave and you can do everything!! ;)

(note, for Vue, it works best on a 64 bit  PC, but any 64 bit app will work better on a good rig, since you can use a hell of a sight more Poser folk when you have 8 gigs of RAM or more!)

"I'd rather be a Fool who believes in Dragons, Than a King who believes in Nothing!" www.silverblades-suitcase.com
Free tutorials, Vue & Bryce materials, Bryce Skies, models, D&D items, stories.
Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!