[fowlplay4]

Well I guess the only thing left to do is make a Feature Request. (I've barely touched tiles, excuse my lack of exp on the topic)

In the short-term I would probably just accept it as a limitation and ignore '0' tiles on tilelayers 1+ then if functionality does get added it shouldn't be a problem to change your tile check function. Would there really be a point to half grass on those layers anyway?

or do could attempt somethign creative with the following:

TTileLayer - object type, parent type is TTileMapObject, cannot be created by script
TServerLevel.tilelayercount - integer
TServerLevel.tilelayers - object (read only)
TTileLayer.gettileanimation(int, int) - returns string
TTileLayer.gettileflags(int, int) - returns string
TTileLayer.gettileframe(int, int) - returns integer
TTileLayer.gettileimagemap(int, int) - returns string
TTileLayer.layerfile - string
TTileLayer.tilecountx - integer
TTileLayer.tilecounty - integer
TTileLayer.tilesizex - float
TTileLayer.tilesizey - float