In the AH2 Object Editor, there was a checkbox option to Display Terrain Under Tile and along with the Is Square Tile Object, these two resulted in the following first line in the .til:
0000000C,1
Now however, without the Display Terrain Under Tile checkbox, I'm seeing the following first line in the .til file.
00000004,0
Is this going to cause problems?
Second thing I noticed.
AH2 also had a Surface Type drop down menu that changed the second parameter of the first line replacing zero with numbers 1 to 4 for surface types. I'm thinking this is obsolete but...
