[Talid Al khatib]

u don’t need an external plug in, u can use fractal noise to do the clouds effects..
any way, if u want an easy stuff I recommend 2 plug-ins:
1. thunderbox sky generator, it gives u the ability to control the sky, the sun and the clouds.. easy, but doesn’t give a lot of options
2. Dellirium has a clouds system, but u need a good hardware…