I remember having a problem before -- Carrara 2, at least -- in getting skylight to go through a transmapped object. It appears that Carrara Pro 4 still has a problem with this...I've got a Poser import rendered with skylight only and her eyelashes are casting big solid shadows on her face (and there is a nasty shadow line from the transmapped hair as well). Is there a solution to this? Adding a light to fix this problem is not optimal for this image but I'll do it if I have to.