Finally after discovering this by accident, 5 years ago, I am releasing a tutorial on how to make units have negative IDs and the tricks that come along with this. I have used this trick in a couple of my maps, such as
Now you are ready to start making some new tricks. Change the units around to however you see fit. Most of these tricks need to have a pair of units with the same negative ID except trick #3 in the tutorial. The easiest thing you can achieve is garrison both of these units into a normal unit and you can unload them indefinitely. As far as I understand, when two units have the same negative ID, they are basically the same unit now. However one of the units acts as a dominate unit and the other is recessive. Example, if you garrisoned both the negative ID units into a normal unit and try to ungarrison them, one will remain garrisoned in the unit and have its icon, and the other will be unloaded. So sometimes you may have to switch the units to get the icon or effect you want. Note that you can use buildings for icons but they get the icons of units sometimes for whatever reason. Read the scenario instructions in the map to achieve each specific trick. I have not done a lot of testing on this double negative effect in the editor, almost no testing in multiplayer, and zero testing with campaigns. This is where I need your help.
There are a lot of oddities that happen with negative ID units. The first is that you cannot select them, unless you own the object and then it is only selectable with the comma "," or period button "." Another is the stupid "unable to unload" error that happens for whatever reason. An example of this is at the end of the tutorial. Also when a trigger with a
Good luck! Post any questions, new discoveries, tricks, bugs, and etc here or email me (check my profile)
[This message has been edited by Leif Ericson (edited 01-21-2012 @ 04:33 AM).]