Yes you can just get rid of the linear gradient at the top of the setup.
I think I was going to make a cycles version and an Eevee version but in the end went for cycles only.
Great work. Before you started on this, how much had you already learned about how the workings of the drive mechanism, and how much did you have to learn specifically for this project?
Well, first I did the traction engine which is basically a steam train with no tracks. I had little knowledge of the mechanism and read loads through of articles.
For this train I found a gear train simulator to get the pistons more or less in sync. This is a brilliant resource if you are interested.
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