Core Viewpoint - The article discusses the limitations of traditional Linear Blend Skinning (LBS) in character animation and introduces a new framework called PhysRig, which aims to enhance the realism and control of character animations through physics-based modeling [2][3][9]. Summary by Sections Introduction to the Problem - Current animation techniques often result in characters appearing unrealistic, with issues such as volume loss and distortion, particularly in soft materials like skin and fat [2][6][11]. PhysRig Framework - PhysRig integrates a rigid skeleton with a deformable soft body model, utilizing differentiable physics simulation to achieve more natural character deformation [3][9]. - The framework consists of three key components: a differentiable physics simulator, a driving point system, and an optimization strategy [10][13]. Physics Simulation and Optimization Strategy - The optimization process involves inferring internal skeletal movements and material parameters from observed animation results, ensuring stability and efficiency through temporal consistency and local frame optimization [15][17][20]. Comprehensive Evaluation and Dataset - A dataset was created to validate PhysRig's effectiveness, including 17 character types and 120 animation sequences, with metrics such as user ratings and Chamfer distance showing significant improvements over traditional methods [19][22]. Applications and Future Directions - PhysRig allows for pose transfer, enabling the generation of natural volume animations based on skeletal angles from existing animations [24][26]. - The project aims to transition from traditional rigging to physically realistic binding, with plans to open-source the code and dataset and develop a Blender plugin for animation artists [29][30].

图片来源： Cheehoo 制作动画是一个耗时耗力的过程，需要经历分镜、渲染、合成和灯光等多道工序才能完成一个场景。如果导演想尝试不同的场景表现方式，动画团队必须 回头调整各个环节，才能最终定稿。 由好莱坞高管和技术专家联合创立的初创公司 Cheehoo ，旨在开发一款 AI 驱动工具，帮助创意人员更轻松地制作动画内容。 这家初创公司脱胎于制作了《乐高大电影》系列的制片公司 Rideback 。 Rideback 的联席 CEO Michael LoFaso 和 Jonathan Eirich ，与公司联合创始人 Dan Lin 共同组建了 Cheehoo 创始团队。其他创始成员还包括梦工厂动画前总裁 Chris deFaria ，以及前苹果 AI 研究员 Yao-Hung Hubert Tsai 和 Wei-Cheng Kuo "通过 Rideback 我们发现，在好莱坞，动画制作的过程正变得昂贵且复杂，" LoFaso 说道。"创作者将自己的想法呈现给世界开始变得愈发困难。我们想打 造一款原生适配创作者工作流程的工具，让他们的生活更轻松。" Cheehoo 的工具为创作者提供了一种快速原型设计和迭代动画的 ...