How can I add points(x,y) in tilemap object?
Unfortunately, custom points are exclusive to sprite objects at this time.
I am trying to make inventory windows, I can make it with a single image sprite but trying to use tilemap instead (probably can improve performance).
Not sure you’re going to see any realistic performance difference between a sprite vs a tilemap for a GUI object.
That said, you could store fake “points” as variables, I guess. Basically set your pointX to Tilemap.X()+YourAmountHere as a variable, then do the same to Y. You won’t be able to do it visually though.