Today I wanna talk about this double image:
I am unaware of the source of this image. We don't have an article which feature them nor do we have them separately.
On Discord, Alpharaptor posted an upscaled version of the monorail image:
On closer inspection, on the right side of the image you can see what appears to be part of the monorail itself. This reminds me very much of the monorail version seen in the early images that was published in the Next Generation article back in 1997:
This early "test" level had a unique monorail section that was not broken in any way. It was probably some early level to test out foliage density or made specific for marketing. I am positive the monorail station image is from the same level.
As for the Stego image, I believe it was part of another test level. I'll make a post about my reflection of that one after this is done. Lets continue.
In the Next Generation issue, there are two other images posted that I always believed was part of an actually Plains level, but after reflecting about this above image, I have changed my view on it. Lets take a look at them:


Both these images was posted back in 1997. On close inspection, the sky, the use of an "light" object, the foliage, they all fit with the images above with the monorail. I am pretty sure these images comes from the same level and not Plains. Fun fact: The Stego in the Dam image is the same as the one in the double-image but just mirrored!
EDIT: Due to the similarity in foliage, colours and terrain, I believe these two which are believed to be from an "IJ" version due to the pylon, actually is part of this level as well, as they are different comparing to the other early "IJ" images with the pylon and gravel hill.


By inspecting the foliage around this pylon, it appears these images were both taken at the same pylon.
What are your thoughts?