I updated the train firstly. The coal carriage never satisfied me. I got some photos of trains of a friend and re drew the carriage based on ones from old steam engines at the york museum. I made it look a bit more industrial rather than the half pipe design it had before.

The pillars are based on the previous light fittings i made. The problem im starting to face is that there are so many light sources the shadows are taking in excess of 5 minutes to render one image. Which may not sound long, but theres 30 images in 1 second of animation. So 1 second would take 30 x 5 = roughly just over 2 hours.
I added a sky texture with fog to the scene just to see how it would affect the light. It didn't do much difference so i left it be for now. The gravel is just a simple grey texture with a bump map on it.