Well, here is the first test of my own Test-Dome, build in Blender.
Fully enclosed dome, the ground plane of the dome is flat and "plays" the water level. (My water texturing needs improving LOL)
Then a morphable ground level plane that forms the foreground and the background mountains. (Yeah, my grass needs work too; LOL.)
But?
I have a road. LOL. (Ha-ha-, just basic, still needs work too.)

The outhouse was a free house here, and I added some Poser plants.

It is about the same size as the BB sphere, I guess some 1500-1600 ft in diameter.

Rendered with the Sky in ambient at 1.000
And a single Infinite light at 65%.
IDL + GC in PP2014GD

Happy rendering all.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!