World Editor V2: starting a new map from a Google Maps Screenshot

Hello there,

I have been going through all sorts of documentation available to map making in BeamNg, but I can't seem to figure this out for the V2 editor: Having a flat 1024x1024 or 2048x2048 terrain with as background image a correctly scaled Google Maps screenshot. I know it will look pixelated, but I just need to use it as a reference to place my roads and shape my terrain. I also want the distances/scale to match. Heightmap does not matter as it is a rather flat area.

Be sure to RTFM me if you have a good resource for this, but my impression right now is that all the documentation is somewhat outdated and doesn't always makes sense to me. E.g.: I read about adding the image in the materials.cs file in the terrains folder, but as far as I can see, this does not even exist in the new map project I tried to create.
Same with following the official wiki on here, basic files such as main.level.json do not exist when following this step by step tutorial with east_coast_usa. What am I missing and where do I go from here?
Thanks!