The Great Wall - stage 4

Finished the sky and have gone on to rough in the landscape. As can now be seen the distant mesa is catching some sunlight, everything else is in shadow; I am taking this bit slowly as I need to get the colour and tone right on the nearer mesa so I stopped where I am today and will have good look at it tomorrow morning to make the final decisions. I ran an Ultramarine Violet glaze over the foreground as I want to separate it from the redder sandstone mesa in the middle distance.