Thanks all! It's a somewhat laborious process, which may be why I haven't seen too many attempts at shaded relief on here... Basically a combination of a climate map for figuring out the colors, an elevation map for the topography, and then a shading layer in Overlay mode in Photoshop where I actually draw the shaded relief in black and white.

Posting a quick update- I had to redo this many times until I arrived at a style for higher mountains I was happy enough with. Getting into a very rugged area in the central part of the continent now, so this should be interesting...

Pangarap_Relief.jpg