The Tilemap object in Unity uses a coordinate system that grows up-right from (0,0). (ie. with the Origin at the bottom-left of the screen.) I'm trying to represent a mapping system that has the origin at the top-left of the screen and grows down-right instead, but I can't figure out how to do it.
Scaling the tilemap's Y transform by -1 draws everything upside-down. Trying to set the object's Tilemap component to custom orientation and setting its Y scale to -1 appears to have no effect, and the editor doesn't accept it anyway, changing what I entered, setting the Y scale back to 1 and the X scale to -1 instead.
Is there any way to fix the Tilemap so that everything draws like normal, except for Y growing downward instead of upward?