I made this really cool thing and i changed around the lights and had this really cool room with curtains and things and its taking over 2 hours now, is this normal? the rest of my computer is working fine, i even made the render size smaller after 20 minutes of 2 percent and it is pretty narrow cutting off some of the shadows and setting even.  so what can i do to make this better? 0or is this normal and should i just let the screensaver go on and leave it be until its done?