I turned off: image sharpening and film grain in the UserCfg file of the simulator. The file is found in ‘LocalCache’ folder of the simulator. I also made sure that Volumetric lighting is set on =1 and volumetric lighting quality is set =2. I am using a ‘naked’ stripped down version of the very latest Nvidia driver which I am having great results from in terms of great looking graphics.
Check out my clouds here, they look fantastic now …