IMHO lights and shadows look better in Firefly, raytraced or not. Also, the P5 material room teamed up with Firefly adds a lot more versatility with reflections and textures. You do come to miss the speed of Poser 4, but Poser 5 has so many more tools and options - I guess it's a trade off. For me, the slow performance and memory hogging of Poser 5 is the biggest headache. I really hope P6 will be faster and less demanding on memory. my two shavings of pressed latnum