I am new to the forum, so I hope this is the type of question that fits here:

I'm trying to find if there is a tutorial of sorts for the effect described by Tom Patterson on one of the pages of his website, and effect that is used in the US National Parks maps. The effect I am interested in is shown about halfway down this page, in fig. 8:

https://www.shadedrelief.com/realism/index.html

I'm working in Photoshop and ArcGIS, but if there are other tools I should look into, that's okay, too. Does anybody know if there is a tutorial out there, or some type of description on how to achieve this effect?

Thanks for any reply!