Here's an update to the test render I posted last night!
I've made some changes to the way the park is laid out, mostly on the lower canal level, changed the camera to be isometric, and adjusted a few other things.
One of the bigger changes is the atmospheric effect and coloring, which is all currently being done in Blender's compositor, with color correction, and glare. I don't usually do it that way - I usually do color corrections in Photoshop - so this is sort of an experiment.
More updates to come, as I have time to work on this more!