When I change the position of a physical sky light, by rotating it in formZ, my renders seem stuck on a previous light, and cast the same shadows no matter what i change. When i turn off all lights and test render, the render does "see" that there are no emitters and the render will "ne black". So what can I do to get my renders to react to changes in the light sources? I even turn off one physical sky and turn on another in a different position and that doesn't work.Could it be that 'physically manipulating" these sources isn't as stable as entering sky rotation, time etc??