A negative light darkens the area where it appears. It also casts a "light" shadow instead of a dark one. In, other words, it acts exactly opposite from a positive light. If you can still go back to your original set-up, edit the light in the first pic in the light lab by turning down the intensity until the shadows show up. I think the light is just too bright, and that's washing out all the shadows. Hope this helps, John

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy