UPDATE
I figured out why I had to use the very different settings. I had already scaled down the head sculpture to “actual” size. Kent is using a giant head here, that he shrinks later.
—————————————————–
The following settings worked for me in Blender 3.5 on a Mac.
For some reason I can’t upload images here … so they are below …
FYI … the Geometry Node’s Pointiness attribute is very sensitive to object side,