Yes, I'm pretty sure that Ulco is right. And I should know, as most of my populations are artifacts left from the TG2TP. Still, it's not terribly complicated, and it's actually easier than in previous versions because we now have instance editing so you can delete and move individual instances. But recreating the image you supplied, would take a lot of technical skill and attention to detail. And those populations are probably masked, as well. But it's not just about populations, it's also about your models and their own quality and texturing.