To be honest the image is drastically different from what CGTalk and Conceptart expect. They want quick dramatic 2D paintings OR production-grade 3D stuff. Unless it's a WIP. If you want 3D you have to do it good, like those things ZBrush/Mudbox do. And you notice the large analog influence over there? One tip: Shaders and postwork. Try making your own materials with variable bump/specular/reflection and great skin. Also try painting over the 3D image (rendered large) for a grittier, bolder look- especially for the terrain, which would look magnificent and much better with Painter X and a tablet in a few strokes. You might think of these processes as long-drawn and tiring (perhaps even longer than the time it took to assemble/pose), but the devil is in the details. IMHO Poser should be more of an indirect stepping stone to awesome 2D art (and if you sculpt using Digital Clay, 3D). It's own output would be just passable. The same applies to a lot of 3D actually. Most of them go through a professional compositing app to make it more dramatic/composited on matte paintings. If Poser renders are not stylized to a stage where they look like work done in 3ds or Maya or Houdini, they will be subjected to scrunity to anyone outside the Poser Gallery- uncanny valley and perception of unfinished pieces at its work. It's definately not insecure people trying to be dicks- the people there would be damn proud of their stuff, like any artist would. Arrogance? Maybe a little, but it happens in the music world (technically proficient artists hurling insults, etc.) and to an extent it's justified. Unless Poser renders are never to be compared to "professional" 3D art, which looks to be quite okay among lots of R'osity artists. :)

In This Twilight- My FIRST public poser work in 2 years!
Also the reason why I endorse postwork (:D)