The station has a diameter of 2km, and the ring takes 88.85 seconds to do a revolution to create 1g at the rim (I cheated by using 10m/s^2, not 9.8m/s^2). I had to work this out for bit in a story I am writing. The lens flare was rendered with the picture, not added afterward during post processing. Background done as a .bmp with Paintshop Pro and image-mapped onto a cube for rendering with the rest. POVRay and MORay.