I was searching for some really big maps where the texture or 3d model quality doesn't really matter, as I would use it to fly in and that would help with performance. I'm asking this because even maps like Italy or West Coast are a little small when flying through them.
https://beamng.com/resources/ghosts-desert.1182/ https://beamng.com/resources/antarctica-98304-x-98304-km-in-size.25724/
https://www.beamng.com/threads/american-road-refresh.100868/ https://www.beamng.com/resources/volcano-canyon.30876/ https://www.beamng.com/threads/journey-the-long-road-public-release.90670/ https://www.beamng.com/resources/flood-escape-crater.25452/ https://www.beamng.com/resources/leap-of-death.206/
WIP - The World | BeamNG (It says "paid early access" but there is one free alpha version available now as well).