I already knew that my system could handle the "Ultra" graphic setting for some time now, but never took that one step further by enabling "shadows" in the preferences. As you can see from these pictures, the addition of shadows adds so much more depth to the graphics. I often admired the photos that I have seen taken with shadows and wondered if I could do the same.
I am happy to say that so far (fingers crossed), things seem to be OK. I have heard that some users do experience lag with them enabled and I have experienced some of that in certain conditions, but overall, I have been pleased with this new ability.