I used a bigger than usual board today to try and capture the space, also a finer weave texture, so the finish is smoother.
I knew I had to work quickly as the light wouldn't be like this for long. I started with the yellow stripe of the sky and worked down to get the important parts in first.
I used Manganese Blue for the sky it works well because its translucent and great for getting a light feel.
The sunrise last about half an hour and then changed radically as the sun came up over the 'bowl'. See pic below with the sun shining.