The castle with the flying island is a modular environment set with emphasize of a stylized look.
The scene was rendered in the Unreal Engine. I also tried to apply different moods by playing around with lighting setting, figuring the tone of daytime.
Story to setting: The little magician Magnus built once his castle on a flying island. On one day his magic power was too less to hold his island constantly in the air. Therefore Magus had the idea to put big tree stems and lumber junk underneath to support his flying island partially with physical force.