I did have 2 layers. One normal then other multiply. When makings images 3d before with bevel and height map I always making duplicate layers, bottom normal, top effects, after effects top layer either multiply or addative, then top layer opacity down, merge.
EDIT: On Brian picture same thing. Bottom layer normal, top layer bevel and 2d illumination. Then multiply, opacity down, merge. After that brightness up little and contrast down little.
What it look like is brightness contrast change not working. That look like the differents.