My suggestion would be to not post negative comments. The basic question would be to ask why you'd want to? There really is no value doing that. If an image is really good, it is worthwhile to give the image a good rating. If enough people do so, the image can join the ranks of favorites and reach a larger audience by being highlighted in one of the "highly rated" galleries. A bad rating doesn't have much affect on the visibility of an image to other Renderosity members, so there's not much reason to pan an image.

The bulk of Poser users are hobbyists and aren't making any money from their work. When they post an image, they're posting something that they think is worth the time to put in a gallery. There is no way of knowing whether the artist is a professional or a beginner. There is no way of knowing how the artist will take the criticism. If an artist wants critiques, there is a forum here where the artist can post a work-in-progress to get suggestions on how to improve the image. Once it's posted in the gallery, criticisms are somewhat of a moot point because the image is finished.

I seem to recall seeing a thread once that said Renderosity has over a million images in the gallery (the What's new section has 24,000 images going back to mid-Nov07, so a million sounds about right). There are more images in the gallery than anybody has time to see. Any one image gets a few days exposure on the What's New pages and is subsequently buried by newer images. The main galleries can only be browsed for the last 45 days. A really bad gallery image has a very short lifespan. It's pretty much gone. The only way to subsequently find that image is by specifically searching through the user's gallery or by another Rendo user that lists either that artist or one of the images as a favorite. A image, that's so bad as give a person a reason to rate it badly, probably isn't on too many favorites lists. A bad image is gone and won't be offending anybody's sensibilities.

What is the value about negatively rating an image? It's not going to be on any of the coveted high ranking lists. Images get most of their ratings and comments in the first few days they're up because they're buried so fast, so that should provide an indication of whether it's worth looking at the image while browsing thumbnails.

I'm wondering how a person can open an image that can upset them bad enough to leave a negative rating. All images have thumbnails and a bad image usually has a bad thumbnail. The easiest way to avoid getting irritated by a bad image is to avoid opening the bad thumbnail. If the thumbnail happens to be uninformative, like the close-up of an elbow, don't bother opening it. There are enough informative thumbnails that one doesn't have to open up one of an elbow to only be disappointed that the image sucks. There are enough options at Renderosity to find good images that it would be hard to find bad ones unless somebody is specifically looking for them.

If a person only wants to look at highly rated, highly viewed, or highly commented images, under the assumption that they should be reasonably good, there are galleries for those and they're now limited to 45 days of exposure, so there's some turnaround. Looking at artist favorites, in artist profiles, is probably an even better way to find artist galleries of interest. The "highly" galleries tend to focus on cheesecake because Poser users are primarily interested in female figures . Whenever somebody finds a great image, the odds are good that the artist behind it has done more very good images and lists favorites that are similar in style.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon