I am hoping someone can point me to a good tutorial for making a nice looking dungeon in Photoshop. I have seen several for GIMP, but have not been able to find any really good ones that matched the one in GIMP. I viewed a couple of simple ones in youtube, but was hoping for a little more detailed.

Although I may be dreaming, if someone could walk through the creation of the dungeon below, which I found somewhere and I consider amazing, it would be excellent. Thank you.

Click image for larger version. 

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