Lighting plays a massive role in the game’s atmosphere. Unlike many predecessors in the genre which rely on flat, bright lighting to simply show the action, Fallen Doll utilizes dynamic, moody lighting schemes. Shadows cling to the contours of the character models, and volumetric fog adds a sense of weight to the environment. In v1.31, the optimization is noticeable; the physics interactions, particularly with hair and cloth, have been tuned to reduce the "jitter" often found in physics-enabled games, creating a smoother, more believable visual experience.
It utilizes the Unreal Engine 4, taking advantage of its advanced features for graphics, physics, and dynamic lighting. Fallen Doll -v1.31- -Project Helius-