All of a sudden I now have flickering grey distant clouds. It does take away a feel of realism. Any help would be greatly appreciated. Bob K.

Hi,Decrease your sight distance. As distant clouds are drawn for the first time they have a habit of doing this. Also, if you are using a 3rd party weather program like AS2004.5 (hint, hint) you can reduce your maximum visibility.Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg

Thanks for the help and the plug. I did as suggested and no more flickering. I might,however, give your program a try.