I'd love to see more different opinions on this. For instance, the one I thought looked more realistic was the one to the right. Although I'm aware that it lacks a proper blending and it'd need a good work on foothills to make it look less like "popping out of nowhere".

Anyways, do you guys think the technique is worth exploring? I mean, can you potentially see a good mountain range coming out of those examples? If so, which looks more promising?