Yes, I can use high res textures, great textured backgrounds, models, and all that stuff, but show me a Poser image or most other CG stuff that looks like a photo.
I've seen a few body and portrait images that are close, but the crispness and light is far from realistic in most instances.

My goal is to, at some point, have a Poser image that looks real. I've been doing portraits and a few body shots to try to achieve that, but they are far from what I see in professional portrait work....
This one is not too bad:
http://www.renderosity.com/viewed.ez?galleryid=191420
and perhaps, these:
http://www.renderosity.com/viewed.ez?galleryid=177611
http://www.renderosity.com/viewed.ez?galleryid=187673
but, still not totally real...the Poser "look" also contributes to the overall unreal perception.

What ideas or techniques can be suggested? Any good tutorials ???

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854