These are a few cloud studies I did a while back with the talented Brennan Massicotte. We wanted to develop a process in photoshop to paint some nice voluptuous clouds. In the first study, I used a simple hard brush, and avoided smooth blending. I wanted to focus on just the values, temperature, and how the forms turned. The second one is similar, only this time I indulged in some smudging. :)
The third study is a little special. It was created using only the Lasso tool on my laptop's trackpad. It's an exercise I started practicing after trying it once during Jason Scheier's digital painting class at Concept Design Academy. I forgot my tablet at home for class that day, but instead of going back for it, I thought it might be an interesting challenge to try painting without it! The exercise turned out to be really useful. For the cloud study, I made the depth of field effect plus varying edge quality by building up selection layers with incremental levels of feathering.