This was an attempt to combine clouds with blue skies. First, I used liquid latex to mask areas for the clouds, then I painted the blue sky. I knew that the sharp edges around the mask would need to be soften, as clouds are soft. On some of the edges, I added water, before the blue pigment dried. This caused some blooming, which works well for clouds, and did soften the edges a bit.
I was fairly successful in the lower part of the sketch, but failed in the upper half. I’m not sure if re-working the latter area would succeed, so I left it alone.
Each of my fails adds to the database that will help me succeed in future sketches.
This sketch was loosely based on the photo below: