“We’re trying to create something that’s hyper realistic and a believable large world. We decided very early on to use Epic Unreal® Engine. Many of us have experience with that. With Unreal Engine, the big plus is that you can modify the source code. It is well-written and easily extendable. …

“Now we can do a couple of iterations in a day for jobs that used to be an overnight process. That’s a huge productivity improvement.” Harðarson adds: “The resolution we’re working with is about 25 centimeters per pixel. Doing this for 100 square kilometers is very memory and CPU intensive. …