Here's a couple of practical details which many people may not realise. 1: Photographers talk in "stops", which are powers of two. One stop difference is twice (or half) the light. So that 8-bit brightness range, 0-255, is 8 stops. Now if you look at something talking about lighting for photography, you can convert to computer terms. 2: You can't get 8 stops of brightness range out of a print on paper. The white of the paper can never be perfect. Photographers usually reckon on 5 or 6 stops, and then used paper with different contrast grades to get what the film recorded fitted to what the paper can show. The ideal for the traditional photographer was to use the full range available to the print, without losing detail. It's a good object for a render too. Do a test, and check it in a good paint program. Use things like histogram functions. Get the maximum out of Poser; that render is like a negative on film, and if it had to go on paper, with any printer, you can chose what to throw away. If the details aren't in the render they'll never reach the printer.