aVersionOfReality writes:
A deeper look into advanced Normal Transfer setups using the Data Transfer Modifier in Blender 3.1. In the previous video we identified several problems. Now we'll see how to solve many of them by using multiple Data Transfers and multiple Source and Destination meshes. We'll also learn more about options for adding details. There are many limitations, and many things that nearly work. Understanding them prepares us to later solve them in Geometry Nodes.
And there's a new post summarizing a lot of information on how the whole workflow works and why.