How can I make a map without using beamng

I want to make a map but without using beam ng.drive since I can't access it at the moment. Is there a program I can use to make one?

 

Blender, but you still should use the world editor if you want OG game trees.

 

Here, try this:

https://beamng.com/threads/tutorial-map-in-a-month.49287/