I was really excited to get to this point. Some deep down and detailed freehand. After making some practice sketches to get a general idea I set to sketching my design over the black field. I didn't care to much about being messy here, it will all be covered in the end.
Next I layed down many swampy layers of the chosen colors and was able to start carving out my intended design.
With the foundation in place it was all straight forward.
Refining and refining, It's still not complete at this point but it's clear to see and is on autopilot from here to completion :)