(03-12-2016, 02:12 AM)Romulator Wrote: In terms of the Level Editor, what happens when you do remove the folder prefix? Try that, then after, try what I mentioned below :3
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Well, in SOMA personally, I haven't done a map change before. SOMA tries to ease the load of coming maps by preloading them. Have you specified an area say, approximately a minute before the map change where you call the Map_Preload() code block? If not, try creating a trigger area around that position, and when the player collides with it, call the Map_Preload() code.
void Map_Preload(const tString &in asMapName, eWorldStreamPriority aPrio=eWorldStreamPriority_Normal);
Contextually, you would use this:
void Map_Preload("02_hospital.hpm");
And there's no problems with your folder structure. SOMA is pretty clever with locating maps, and in general, is a lot more organised than having one folder with every map. Frictional Games followed the same approach with their maps in the base game. 
Those were some really cool tips, thanks! .. But I'm afraid they didn't work :S
HOWEVER, I put a triggerarea in front of the leveldoor and used PlayerInteractCallBack to change the level, which suprisingly worked! (Still looks a bit clumsy, though, but better than nothing!) But thanks anyways, now I can continue working on my mod until a next major problem shows up!