Actually, I'm inclined to think that the oft-expressed view that artistic merit is only in the eye of the beholder is too much of a snap judgement. If that were true, there would be no such thing as art theory or art criticism; the subject would be impossible. Find a good art critic and read an essay discussing, let's say, any painting by J-L David (to name a favorite painter). Now try applying the same critical principles to a few Poser images.

There may be borderline cases, true, but it's wrong to focus on these and thus imply that the core areas don't exist. I can show you pictures that CLEARLY have artistic merit, and others that CLEARLY do not (and never were intended to have). So in principle, objective judgement is possible. The existence of reddish-purple and blueish-purple and purple doesn't mean that red and blue don't exist.