At my age, I don't have much hair anymore, but I'm going to end up pulling out the little that's left....
I've made your changes and I've taken the opportunity to put the right files into material/editor.
it doesn't work.
I changed the bcg_map_name[] line: "/map/bartoland.mbd"
I tested with or without the last line of editor_data.... it's the same
I tested by removing editor_data_custom... nothing does....
I tested with your files.... nothing at all
I don't understand, because I see from your image that you have the background......
I abuse your time and I'm sorry about it.
https://sharemods.com/0cofdehoy3tc/Bartoland.zip.html