This isn’t exactly model train photography, but I thought it was interesting nonetheless.
"That’s part of what makes the work of Sergey Prokudin-Gorsky so fascinating. In the early 1900s, he developed a color photography technique.
Prokudin-Gorsky’s technique involved three exposures. Each exposure could take several seconds or more. The images were combined in a special process.
In 1909, Prokudin-Gorsky started work on his life’s project. He traveled Russia extensively for 10 years. He captured thousands of images documenting life in Russia.
Among his accomplishments is the only color photograph of Leo Tolstoy."
http://quazen.com/arts/photography/the-incredible-century-old-color-photography-of-prokudin-gorsky/