Gumroad - How to Paint Clouds by John Wallin Liberto
https://captflushgarden.artstation.com/projects/qAA58a
It includes 5 narrated videos with instructions on how to paint clouds in different lighting and weather conditions.

Package includes: Five videos (total of 180min) including an introduction to clouds, 3 landscape tutorials, and form practise tutorial, with tips and tricks. (see images) Five .PSD files with all layers from the videos.

 TO MAC USERS: If RAR password doesn't work, use this archive program: 

RAR Expander 0.8.5 Beta 4  and extract password protected files without error.

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