Morph
From polycount
Morph is an animated 2D or 3D effect that makes one texture or geometry smoothly transform into another.
When used with models, all the shapes must have exactly the same vertex count, and vertex order. The individual mesh shapes are called blend shapes, or morph targets.
Morphing is often used to create customizable game characters, for example long vs. wide face shapes.
Morph comes from the word metamorphosis.
