Adding Shaded Relief in Photoshop

I’ve had occasion, from time to time, to show my colleagues in the UW Cartography Lab the technique I use to combine shaded relief with other map layers in Photoshop. After a recent request to share the technique again, I decided to make a video, so that people can watch at their own convenience. So, if you’re interested in this:

Equation

then watch this:

(make sure to view in HD, so you can see the details I’m talking about). If you’d like, you can also follow along with the same file I’m using: https://www.dropbox.com/s/6teczksvgajrxdb/ReliefTutorial.psd?dl=0