So this might be a tricky one but hope it's possible. I'm just familiar with the basics of geometry nodes and want to place objects where I painted with vertex color. But I also want a different object depending on if it's in a corner, a straight line and so on. This is my test vertex color:

And have this setup so far, to place test cubes on the white color:

And what I want is something like this for each cube, similar to what 2D map editors do with autotiles, like gamemaker, rpg maker, tiled etc. I would use a different cube for each case, 13 in total, each with a fitting texture.

If it's not possible with this method, I'm open for other ideas. My goal is just to automatically place the fitting texture to save a lot of time in contrast by placing every cube/texture by hand.

Thanks in advance for every help!

I edited my question to hopefully make it more clear and easy to answer:

What is my goal? I want something similar to this in blender: https://www.youtube.com/watch?v=RfyXNhOnQQg&t=3m2s

My starting point is a plane where I delete faces based on vertex color to "paint" geometry. So far so good. Then I select the faces in the corner and edge of the plane, so give them a different material.

But now here is my problem: I want every face at edge and corner have a different material, based at which direction is outside. For example for the orange corner, the outside is +Y/-X. But how do I get this attribute and select with it?

If it's not possible with this method, I'm open for other ideas. My goal is just to automatically place a fitting texture to corners and edges to save a lot of time in contrast by placing every cube/texture by hand.

Thanks in advance for every help!