Well, a few things we can note from the "Screenshot" [still having a hard time being convinced of this]

The first thing that says photoshop to me is the rendering of the light on the chimera's necks. Maybe it's just because the engine is rough, but there is all this shiny glossy on its neck, but with all that brightness nothing is really casting a defined shadow, and it doesn't seem in tone with the overcast sky in the image. In fact, the ground texture almost seems purposely done because it's so difficult to tell what's a cast shadow and what isn't.

One thing to notice is that the chocobo seems strategically placed, because if you look closely the chocobo seems to have a smaller texture impact.

It might be a "real ss" but that doesn't mean that's the quality we get in the future.