The old mantra was, "Use bones for body, morphs for face." The new reality is, "Use bones for broad strokes, morphs for everything else."
Morph target animation, also known as blend shape animation, is a technique used in computer graphics to create realistic animations by interpolating between a set of predefined 3D models or shapes. The process involves creating a series of 3D models, each representing a specific facial expression, pose, or shape, and then blending them together to create a smooth animation. This technique is widely used in various fields, including film, television, video games, and advertising.
In a game engine or animation software, you don't swap between these models. Instead, you mathematically interpolate the positions of the vertices. You tell the computer, "Move the vertices from the Neutral position 50% of the way toward the Smile position."
