It kind looks like you're using PS to make your maps, is that true? If so, I think that you're using a layer style to make them show up. Yeah/Nay? If both assumptions are true, then you can use a different contour on the bevel and emboss (something opposite of the half round option). One of the things that i've learned recently is that the mountains need to be "chainey" I've found that if i play with the layer mask i'm using for the mountains in Liquify, i can generate a set of mountains that look more like the intersection of tectonic plates instead of random bumpiness. AND if none of this make sense, you're probably not working in PS or with my particular method of layers so nevermind. All in all, i think that if you could make them more like collision points of tectonic plates rather than masses, it'll make it feel more realistic.