Thanks RippedWorld!

I found that once you get your head around Photoshop, it's actually easier than one might think. Still takes a lot of work and endurance, but it's worth the effort!

About blurring the black lines: this would still be confusing, since ridges are usually the brightest, not darkest part of a mountain. Also, blurring would take away the little sharpness that is there. But thanks for your thoughts!