'The Gut' painting from Mortal Engines is finally finished. It took quite some time to get the colour and lighting right, and to keep it in balance. Adding the blue light at the top of the eaten city was a way of balancing the composition with colour, as it's surrounded by orange/yellow colour, and the uplighting is red, so made a lovely hellish contrast.
I drew from a lot of research material- mostly steel mills for the smoke and atmosphere, and Hugh Ferriss drawings to see how light and dark could be used in the composition.
You can see an animation showing the picture being developed here: