"Off-Map Cliffs!" is a very small utility under the form of a .scx tutorial, which basically explains the very obvious and not complicated, but at the same time very useful and underrated trick of having the cliffs at the edge of the map look better by creating the illusion that they continue off-map.
This was new to me, even though I sometimes played around with rotating cliffs in the editor, I never actually thought of giving it this particular use.
One might say this isn't actually that useful, and it's a really small and unimportant part of a design. To them I say, a great design involves paying attention to detail. And this is one of those details that can give your map extra depth and realism. Particularly if you're doing a minigame, or a game where for some reason the map edges play a very important part.
The trick is actually very easy and would not really necessitate an in-depth tutorial, however it is so easy that people don't even think about it. All the more reason to congratulate Lurkur aka OtmShankIiI for uploading it.
Like I said, the trick is very easy. However, it's always good to have someone patiently and clearly explain a trick to you, and this is what this is. A very easy to understand tutorial that shows you by visual means what you are supposed to do. The archive also contains a text file that contains everything you need to know about the utility. Even the map design in the scenario looks really good. Nothing to complain about here.
A very simple trick, but a very good one, and useful for those who want to take their maps to the next level. After going through the scenario you will probably be asking yourself how come you never thought of that. Recommended download.