Here's another illustration for Vorpal Games' Red Aegis. This one involved showing a day-to-night, orange-to-blue transition of a city (Wimachanca) high in the Andes, built around a huge pyramid. It was difficult to work out the color transition in this one. I don't paint cities much and I find that when I do work on a picture like this, it can be a bit of a rabbit hole. I could have continued adding details and tweaking this one for days.
As in the previous post, I've included the preliminary sketch and the grayscale study.
You can learn more about Red Aegis at the links below: