Step 1 worked, I've got all the prefabs in the Tiles-Folder. Step 2 always says "Success! Found prefabs for all tiles! " but the TileLoader-Script hat 0 Tiles
what do you mean by: "Step 3 works when I do step 2 manually" ? You mean you fill in all the tiles one by one?! >_<
I think you may be trying to load the wrong map in step 2? Or loading a map that does not contain a definition for every needed tile? Otherwise it wouldn't say 'success'.