Hi John, thanks for your reply and support.Yes, the problem occurs with the default real weather setting. I can understand the "holes" (no clouds) in the upper sky layers, but at airport elevation level clouds should be visible again, or am I wrong? The default x-plane weather (without SkyMaXX) works, i.e. the clouds are visible at the destination area. I also have to reload the real weather sometimes, when I start xplane, because the clouds are not visible. Bye, Oli