That's where my knowledge hits its' limits. I understand the big picture -each operating system will have its own opportunities and challenges - but I'm not always up to speed on the technical details. I know that even with Lightwave I don't always use volumetric lighting - it's that render time thing as well as style. Best I can tell the lighting system in P5 hasn't changed. I've recently seen someone post renders where the Poser lights had been really finessed and he'd gotten results that are much better than the norm. I've also seen one of Kupas posts where he really went into detail how they could be optimized. There's so much that can be done even with basic spots (that have falloff) if you know what you're doing. If we learn how to use the basic lighting better, our renders should be better and Firefly may have some kind of performance curve where all of a sudden it "shines." Obviously I'm just hypothesizing. I've noticed that the comments of the pix at RDNA suggested that the renders, while still not up to the high end apps, significantly reduced the postwork required. That to me, sounds like an improvement. I don't have the trained eye of an artist so I'm at a disadvantage as far as making my own judgements and presenting them.

Before they made me they broke the mold!
http://home.roadrunner.com/~kflach/