Popped along the river to Hammersmith where an interesting rig has just appeared. May be something to do with the planned super sewer under the river. Not sure. One of the lessons I learned today... just because something looks interesting, it may not make a good painting! Other than choosing a dull subject I got a few other things wrong. The perspective on the building in the background seems to have disappeared, and the domes are not similar enough in size. The reflection of the rig is not dark enough. The trees and the sky are too literal, not abstract enough.