Usually with these programs, they just commission an artist with some vague description, like they tell him to draw a futuristic VTOL aircraft, these pics have zero bearing on what gets delivered.

Sometimes they even take the piss with this, like in this video for a next-gen engine, where you can see their engine doesn't even fit in their fantasy aircraft:

https://www.youtube.com/watch?v=vCHun6rxQm0

That's got to be one of the most comically bad compositing I've seen in a while. I can't believe someone said, looks good, ship it.