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.
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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,
