From Pokemon FireRed/LeafGreen
The main goal was to make a tilemap editor with geometry nodes and vertex group
For the start i remade each unique tile as its own object - with faces and a few vertex groups for color
Each tileset has its own geometry nodes setup for some crude palette system
Which tile is put where depends on the value of vertex group called just “mask” sampled from the original geometry
For Each Element loop in main group checks the value of edges on each face and then assigns proper instance ID, at the end tiles are instanced from collection with Instance on Points
There is also another geometry nodes setup that puts grass automatically over full green tiles only
Trees, flowers and tall grass use a less sophisticated setup - just planes, some arrays and Instance on Points
First idea for a render
Close-up