These are some articles that I found on worldbuilding. They give some food for thought for our concept art/build a world project.
Chuck Wendig (2013) 25 Things You Should Know About Worldbuilding:
Tad Williams (2013) Thoughtful Thursday: Tad Williams talks about world-building: (The importance of research and giving glimpses into something bigger).
Charlie Jane Anders (2013) 7 Deadly Sins of Worldbuilding: