Good reproduction!
If you have wheat that is in focus, and wheat that is out of focus, the sky has to be out of focus, because there is only one focus level.
With a short focal length and/or small aperture you could get more focal depth, but to get the sky in focus, the mid distance would also have to be.
So if your TG sky is slightly more blurry than the reference, your virtual camera just had a bigger aperture or focal length. Still plausible.
And nice picture.