I'm following a tutorial on fantasy cartography. It was written for Gimp, and I've been figuring out how to convert the steps to Photoshop (CS6) as I go along. The step "Bump Mapping your Height Map" on page 7 uses Gimp's Bump Map filter to simulate relief shading on the terrain height map generated in earlier steps.
Is there a Photoshop equivalent for this filter? Third party plugins would be acceptable. I've tried searching for one, but Google keeps giving me tutorials on how to create bump maps in Photoshop for use in 3D rendering programs, which is not what I need.