Hmm... it seems i managed to fix this problem for now.

I copied Terrain_000 from ....Steam\SteamApps\common\Divinity - Original Sin\Data\Editor\Mods\Mod_name\Levels\test_level\Terrains to ...Steam\SteamApps\common\Divinity - Original Sin\Data\Mods\Mod_name\Levels\test_level\Terrains and overwrote it.

for some reason that file is bigger in size in editor folder than in mods folder, probably doesn't save something there that is needed in editor.

Last edited by Anomalous; 26/04/15 06:27 PM. Reason: text edit