GameMaker purpose of last tile in 16 auto tile

Hi there,
simple and stupid question of the title.

My assumption is, that it is the backgroundlayer for the tileset, am i correct?


Thank you for clarification.
 

TheouAegis

Member
Which tutorial are you using? Various tutorials handle the order of the tiles differently. You're either talking about the blank tile for when there is nothing there or the middle tile for when it's completely surrounded on all sides and all diagonals.
 
The last tile of the 16 autotile is set if you press right mouse button in the room editor. The first is the one which is sorrounded by other 1's or edge/corner tiles.
And if I try to recreate the GMS autotiling I dont see the sense behind this tile, either I dont use it, or its a tile which is sorrounded by "no tiles" or "border" tiles.
 
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