I'm going to suggest experimenting with a very simple scene to try out this new revelation - do look at the material option of reducing the diffuse value & increasing the light, and leave the IDL intensity as is.

I'm getting very interesting results just with an Environment Sphere - shading & contrasts seem just right now. Will post an example in a mo.

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

                                      www.danielroseartnew.weebly.com