Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3982720&ebot_calc_page#message_3982720

xoe, in current versions of poser, mirror surface has little or no diffuse (no colour); reflects  range of visible spectrum. one may wish to start with bill's basic fresnel shader:

 

general technique in poser: start with basic shader, then change variables/add nodes until it looks good.  trial and error for most, simple math for bill et al.