"I just got the Lightwave/Vue5 package. Which one has the better renderer?" Lightwave is by far the more mature and proven renderer. "Imo the Poser 6 rendering engine surpasses the Vue rendering engine." In some ways, I agree with you. To it's credit, however, the way Vue handles instancing and memory seems to be much more efficient. Also, Vue does have far greater control over the render output, specifically regarding G-Buffer channels for post production on video and stills.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.