The original intention was to create landscapes that could be described as "evil". But the result is a bit different. While you can get "evil" (let's not have a philosophical discussion what evil is, I'm really only thinking about fantasy movies and literature), you can also get "gloomy", "chaos", "darkness", "moody" and "spooky" ... maybe more depending on the Checkpoint.

Just look at the pictures to see whether this is of interest to you.