Full body portrait of a disturbing man, featuring unsettling surrealism and nightmare-inducing elements, blending darkness with terror. The artwork should be inspired by the styles of Greg Rutkowski and Yoji Shinkawa, showcasing intricate lines and particles. The image should be in 4k digital art format, resembling concept art that is trending on ArtStation. The figure should have bizarre anatomy, including extra limbs, poorly drawn facial features and extremities, a bloated and disfigured body, and an elongated neck. The composition should include elements of distortion, with a double head and deformed limbs, creating a chaotic and eerie atmosphere.