I've searched this forum and elsewhere, and can't find anything. The old editor had a heighmap import tool under the File menu, but the new one doesn't. I've tried every method I can think of to replace files with my heightmap image, but nothing works. How the heck do you get your own heightmap into a new map to edit with the new editor?
Forums keeps resizing my image, but if you squint you'll see on the far left that my mouse is hovering over the new "Import terrain" button, which is found under terrain tools. And just in case, this is the terrain tools button:
