This concept was used in KimaruSunkill's Portal map.
So, I was messing around with GUEdit (a protector), and using it's switch terrain feature.
I checked the map, and saw that replacing the old map's doodads we're black rectangles. I tested it out in-game, and sent one of my SCVs to try to go over it.
The doodad still had the collision properties (or whatever it's called) in them, so my SCV can't go past them.
So, I found out how KimaruSunkill made those cliffs/gaps, and started using the concept in my maps.
So... yeah...
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An artist's depiction of an Extended Unit Death
Black rectangles? You mean null tiles?
The collision part of doodads are actually terrain, and the visual part with no collision is a sprite. An example would be the tree doodad: the stump is actually terrain, and the branches/leaves are a sprite.
When GUEdit changes the tileset of a map to something else, the index of the doodads' terrain tiles are null tiles on the new tileset.
Post has been edited 1 time(s), last time on Feb 1 2013, 4:23 am by Roy.
Thanks for the clarification.
None.
Yeah so in other words you can just use null tiles straight from SCMDraft2, and don't have to use this technique. KimaruSunkill most likely did not use GUEdit to glitch doodads in order to place these null tiles. It is much simpler than that.
Check out
SCMDRAFT2. To place these null tiles, just go to the tileset index when terraining and select any one of the black areas.
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I have SCMDraft2...
And I did not know you could use the Tileset Index and actually select the black tiles.
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NudeRaider -- blessed innocent soul knows nothing of the strife we had before EUDs were discovered 
DarkenedFantasies -- Probably just didn't care. For example, at some point before release, they've updated the graphics of some of the Protoss buildings (Forge, CyberCore, Citadel, Observatory, Arbiter Tribunal), but instead of properly re-rendering them with edited 3D models, they did crappy copy-paste jobs on the rendered graphics.
