Create a 3D animated scene of a young boy named Jack, with short spiky dark brown hair and bright brown eyes, walking into a lush, green forest. The sunlight filters through the leaves, casting dappled shadows on the ground. In the background, depict a dark underexposed painting style inspired by Kawase Hasui, showcasing the sea and rocks in front of Chichirijima Island, with a pink sky at dusk. Jack waves at a flock of birds flying overhead, his cheerful demeanor highlighted against the contrasting blue waves and black rocks. The scene should feature high saturation and a dark blue color palette, enhancing the vibrant yet serene atmosphere.