Controlling individual TileMap cells (only make visible once visited)

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Godot Version

4.2.1

Question

Hi,

I am working on a isometric tile-based game. So far everything went smooth :slight_smile: Godot really works well :+1:
Now I want to control the visibility of individual cells of a tilemap: everything is invisible at start but gets visible and stays that way once the player touched the cell. I read about “runtime updating” the tilemap. Do these functions get called for every tile, every frame (so I can keep track of which tiles have been visited?)
Or this there a better way?

thanks for any hints in the right direction
Andi