The Castle of the IceKing is the Concept Artwork we have made in collaboration with Leartes Artists Oguzhan Kar and Mert Durmaz . It is the fictional world , the Environment around Gothic Castle ruled by Ice King . 3D base of the Environment in has been created by Oguzhan in Unreal Engine 4 and Mert has done Overpaint on it in Photoshop to reach oil painting effect and add details.
They have used some awesome Unreal Engine Marketplace Asset packs for this Environment as Listed :
https://www.unrealengine.com/marketplace/en-US/product/gothic-mega-pack-by-meshingun-studio
https://www.unrealengine.com/marketplace/en-US/product/gothic-castle-environment
https://www.unrealengine.com/marketplace/en-US/product/matte-painting-skybox-pack-iii