What are blend shapes?

Maya: Blend Shapes for specific parts of whole mesh on Vimeo

Lips rigger and blendshapes - Rigging General - mGear Framework Forum

How to Rig Facial Expressions with Blend Shapes

Blended facial shapes of a human face created by using slider

Blend Shapes Preset Tool [Released] - Unity Forum

Is there a way to do linear interpolation of blendshapes like this? : r/godot

Can I duplicate & detatch a mixamo model for blendshapes? : r/Maya

Blendshapes from our Blendshape model for facial animation

Character Blend Shapes Add

What is blendshape exactly? - Quora

Introduction to Creating Facial Blendshapes in Maya

Maya blend shape tutorial (blendshapes)

Maya User's Guide: What are constraints?

rigging - Blend shapes, but for textures/decals? - Blender