
Continuing on with the process of working out compositional details, it was time to finalize the background. In the first step, I made a lot of changes to the background in an effort to add some realism to the steel mill. I think I accomplished that goal, but at the loss of some of the visual elements I liked the most. In particular, I was unhappy with the elimination of the arc of molten metal falling through the air. In fact, I was not at all happy with the background. Not only did I miss the pouring metal, but I thought the new arrangement was a little too boring. In addition, Sara pointed out that it was not at all obvious what was going on (it seemed obvious to me, but only after several days of sorting through hundreds of images of steel mills). In the end I decided to completely change the background again. The book describes the tapping of an open hearth furnace, and the filling of a ladle that could hold 200 tons of molten metal. There is an awe inspiring, though brief, mention of the metal falling through twenty feet of space in a shower of sparks. I loved the image this suggested, but also loved the idea of the enormous machinery of the ladle pouring the metal into the moulds that would give it its final form. I decided to combine the two and depict the metal being poured, in a cloud of sparks, from the ladle.
As usual, I will be using multiple reference images for this painting: some for the basic design of the equipment, some for textures, and some for color and lighting effects (many of the best images of steel being poured from this era of steel production are black and white). Even with great reference material (particularly with multiple sources), one of the most essential elements of a convincing, realistic painting is the proper use of perspective. This is especially true when the subject matter includes architecture, machinery, or any other components comprised of straight lines and precise angles. I have included three images with this post to demonstrate the use of perspective in laying out the background for this piece.
In the first image, I have loosely sketched in the basic layout for the background and then, based on that sketch, placed a horizon line and three vanishing points, all well outside the picture frame. In general, the distance between vanishing points for lines at right angles to each other should be at least three times the largest dimension of the piece to avoid a fish-eye effect, though there are exceptions. Two of these vanishing points are for the major horizontals and one is for the main diagonals. (There are several good books on perspective for artists if you are interested in more details.) I am generally pretty good at eyeballing perspective. You may notice that most of my grey sketch lines match up fairly well with the blue perspective guide-lines drawn in afterward. The use of the vanishing points simply helps tighten everything up and catches any mistakes (notice the discrepancies in the bottom, right corner). It really shows in a finished painting.

In the second image I have used the perspective guide-lines to more exactly place the basic structure of the background. Once I was happy with the arrangement I sketched over it in red ink and then erased the looser layout lines.

In the third image I have used some reference material and red and black ink to render the major details and values of the ladle pouring the metal, and of the mill. The un-finished section is where the figure will eventually stand.
So, now I have a background for the painting that is reasonably true to life and that I am very happy with. I’ve managed to bring back the arc of molten metal from the original composition, keep even more of the sunset outside the windows, and to add a lot of architectural/structural elements which I love to paint. The next step is to combine this sketch with the figure study to create the final composition.