Quote - sIBL is very good - have used it in poser.  but try explaining to users how to convert the sun position (poser infinite lite with altitude and azimuth) to UV-coords.  fortunately the ones I used were always (u,v)=(0.66,0.33) or something obvious.

have never needed to use the sun with sibl in poser.. in fact.. if you use the sun light you're sort of defeating the purpose and working against yourself since the sphere used for the ibl blocks out the sunlight.  ibl's are meant to be used to give realistic environmental lighting