Static enviroment, better to use Blender or jMonkeys Terrain Editor

If you are making an enviroment for a game, that won’t change/will always be the same (etc Dust 2 in Counter Strike). Would you recommend using Blender to make a giant scene or jMonkey terrain editor?

I would probably do it with blender, and also if its static, seperate it into a few parts, that are not visible from each others.
(Eg if on B i dont need to render A)
Then hardcode the visibilities, from wich locations I can see aproximatly wich others.