How to build a tileset ?

[Textor]

I set in WE UNLIMITED - TILESET = can be buildet but i dont know how can i build it. For example how can i make when a unit click on a place there is the tileset.

 

[PurplePoot]

In GUI

• Environment - Set Terrain Type at <point>

Or, in Jass

native SetTerrainType takes real x, real y, integer terrainType, integer variation, integer area, integer shape returns nothing