R_Hatch:
I think that bird is right. The Lux renders look very good. I would consider to pay for an interface. Or better, I would love to hear that PPro 2010 has already one. But I expect this to be wishful thinking.

markschum:
I am very curious about a Lightwave render. Would be very kind of you if you can spend the time to render something like my simple room.

Images from the Lightwave gallery:
excalibur.renderosity.com/mod/gallery/index.php
excalibur.renderosity.com/mod/gallery/index.php
excalibur.renderosity.com/mod/gallery/index.php
excalibur.renderosity.com/mod/gallery/index.php
(to be fair, those renders would also have taken hours to render, I think)

Regarding photorealism and Poser.
I think no user of a previous Poser version believed in the marketing on SMs website. I never expected to get photorealism. But I really thought to get clean renders with a nice IDL. And I thought they are somehow predictable. But now the situation is, depending on what is near a light, I get a average or a not so good render. But I as a simple user does not now when I get what. Again I need to make a lot of tests. After that my final conclusion is, Firefly does not support a pointlight with a bed table below it. Maybe I am wrong, but I don't know what else to do now.
But on the other hand, the ground floor looks good to me. The blinn does a nice specular, the noise node makes a nice bump effect and the wood shader is also ok. I like the IDL effect on the cusion and the bed (except of its front). That's all ok for me, I am just a hobbyist. So there are a lot of good things. So I have 80% now. But I bought the update to get 95%. So hopefully somebody tells me what I am doing wrong or, if it is really firefly, next SR will improve it.

Art:
Yes, the question what is art. I don't dare to have an opinion, because I am not an artist. But I have one thought. Before I can even consider to make art, I should be able to do simple handcraft (hope this is the right word). What I am trying to do with Poser is to get simple scenes done. I think, if i can render a room in daylight and with evening light and with moonlight setting, and a viewer would say, "hey that looks somehow realistic", then I can start to think about art. But at the moment I have the feeling, that the tool I am using hinders me getting the basic handcraft right.