By the looks of it, I'd say you were looking for Jezelf's tutorial, though not certain.
About three and a half years ago I found a tutorial that walked me through the techniques I used creating this map:
Going back for a similar project however, I can't find the tutorial anywhere. Does anyone else remember this tutorial? It was quite long, I remember it took upwards of three hours to work through the whole thing, and very in depth. I can't remember if it was on this site or another, but I figured that if anyone would know it would be here.
Hey, that's exactly what I was looking for! Thank you!