Volumetric Clouds is 3D clouds shader that can cover and obscure objects in the level such as mountain. This project consist of Day & Night cycle with flexible parameter including Cloud coverage( The percentage of cloud coverage in the sky), Cloud Density, etc. Easy to customizes.
Thank you for your feedback. The Jitter variable must be set to 1.0. For non smooth effect like your image, are you adjust r.SeparateTranslucencyScreenPercentage? If this value is low, clouds will render like that picture. (try to use 100)
For artifact problem. you should decrease density variable. If you get high value of density, you should increase RaymarchStep. For my suggestion, you can use fog to make it better.