Nice job, I really like the wreckage you added. The AT-RT looks good, and I love the way it crushes the Super Battle Droid. I like all the action too. Also, I added a lot of my advice/tips in the group Star Wars Planets.
It looks correct to the landscape, and I like the ruins. BTW, the word "custom" is so overused. Take a pencil, make a dot on a clonetrooper, and it's a "custom clone".
See? Anything not mass-produced is obviously custom. But, the diorama itself is well done.
This is one of the only Korribans on Mocpages and I congratulate you for building such an unoticed world. The detail is great but I just thought I'd tell you that Korriban is a sith tomb so you got the sides wrong, but that does'nt really matter. The detail is perfect but you might want to add a vehicle for the droids. The AT-RT is good too, don't worry about it being flimsy most are.Speaking of sith themed mocs can you take a look at my newest MOC? http://www.mocpages.com/moc.php/155138