Blendshapes
Blendshapes (also known as morph targets or shape keys) are a computer graphics technique used to create facial expressions and other deformations on 3D models by interpolating between predefined target shapes. They involve storing multiple versions of a mesh (e.g., a neutral face and various expressions like smile or frown) and blending them together with weights to produce smooth animations. This method is widely used in character animation, especially for facial rigging in games, films, and virtual reality.
Developers should learn blendshapes when working on 3D character animation, particularly for realistic facial expressions in games, movies, or interactive applications, as they offer efficient real-time performance and fine control over deformations. Use cases include creating emotive characters in video games (e.g., using Unity or Unreal Engine), animating digital humans for films, and developing avatars for VR/AR experiences where facial tracking is involved.