A comprehensive state-of-the-art report on building digital humans, covering the full pipeline from 3D morphable models and parametric body priors to photorealistic neural avatars. We survey methods for face, head, and full-body avatar creation, including mesh-based representations, neural radiance fields, and 3D Gaussian splatting. The report provides a structured overview of capture setups, geometric priors, appearance modeling, and animation techniques, serving as a guide for researchers and practitioners working on digital human technology.