I was watching a programme about Joseph Wright, a famous painter from Derby who used chiarascuro to paint fantastic images, from blacksmiths at work to factories and landscapes. His first painting that was bought for the city of Derby. It was paid for by public donation. It was called the Alchemist. Later in his life he went on a grand tour of Europe. He painted the volcano Vesuvius as an explosion of red lava and dark boiling clouds of smoke and ash.
I tried to do a quick digital sketch of what I saw but it was too complex to represent so I made up my own idea. This was drawn in ArtRage oils and the metallic setting was on about 50%.
I used the drawing tool on 100% for the wider brush strokes and 50% and 25% for the thinner lines. I also had the phone in its side so the image is in landscape format.