Quick proof of concept shows the plugin doing exactly what I need. I made a small 8x8 grid:
I made a blueprint that loads the image and trolls through the pixel array. Wherever it finds a black pixel, I spawn a tree instance:
Simplicity itself. I now have precise control over the placement of objects in my scenes in a way that I can easily control through visual means. And I’m sure that’s just the start. Now, I will be able to use the same heightfield I use to make a hill or mountain tile mesh for Z’s map gen to control the placement of on that same mesh.
, I love you. 
J^2