Geometry Node Shape Key and UV Tangent (Experimental)

A geometry node shape key setup in Blender 4.0 or later.

This method references other objects (with the same topology) and applies the shape offset.

This includes a UV tangent node (for the tangent space offsets) which can be very useful on other projects.

This is experimental, and may need update/fixes in the future.

Character model is from the Blender open movie "Charge."