While ActiveSkyFS has Live Weather, it is currently incapable of rendering diverse weather scenes in full control (known as “preset mode”. In “passive mode”, the program enhances the sim’s native Live WX by adding more realistic winds and cloud turbulence). Meaning, if at your departure airport conditions are clear, the entire sky will be clear, even if that is not true-to-life. As your position changes, clouds will start to form, and will eventually match real weather reports, but then your departure airport will be cloudy as well. Also, if there is a cloud layer which tops out at 5,000 for example, there will not be any taller cloud tops above that height. So towering CBs are not a thing with ASFS, although it does render multiple layers far better than the native Live WX. Hope I’m not making it too confusing…