After the part where you put in the shaped angular blend, I just cut a hole out of the center with a 5-10px feather, then added extra highlight on a new layer. Merged the two, then continued with the rest of the tutorial.

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Quick question though...I've found emboss really makes the mountains pop and takes less steps to accomplish. For example, the volcano above is just using emboss. Is there something I'm missing with not using height maps, etc?