I think flat screens are better than CRT ones for that.   I suspect that the problem is with high-contrast, rather than low-contrast settings.   There is also the fact that default Poser shadows are far too strong for most purposes.   Then there is a Poser peculiarity that makes a light's intensity a percentage, but the shadow value a decimal fraction.   Poser is quite happy to let you set the shadow for a light to 45%, rather than the intended 0.45, with the result that the scene looks less illuminated than irradiated.