Well first of all, Geralt is a witcher, so he sees better in the dark, hence "light" appears around his immediate..er, surroundings.
Second..what the actual heck are you taking about? I have never seen a game with cloud shadows as good as this. The lighting on the terrain is constantly changing. Don't really understand your point.
WHERE ARE THOSE TINY CLOUDS THAT SHADOW THE EARTH ? its ANTI REALISTIC - were do you se 10 cubic meters of shadow here and there ? wtf ? if a cloud is shadowing the sun no it will shadow 100-200cubic meter at least, not 10-20 like its a disco ball ffs