Yeah, I get their new Facebook posts almost daily and have been looking at XY number of train/railway/station albums and each album Z times
It seems incredible if we have overlooked some very interesting ESPERANZA station candidate (or a possible double track with a constructed temporary station between real ones) in Almeria-Granada, or even Jaen, Cordoba and Malaga (or even Valencia, Alicante, Murcia).
It should be easy to identify and recognize the ESPERANZA station background hills or backdrop as you put it, IF you encounter them somewhere and also could see the railway in the correct relative position, either on o photo or on Google Maps 3D, but it seems impossible to find it. I still think that Piñar is the least bad candidate but which anyhow should be ruled out with 100 % probability if there not was some or several “hokus pokus”.
I haven’t looked after a candidate 100 % systematically on Google Maps 3D meaning having made notes of that (since this is after all still pure play), but I have probably anyhow travelled along the possible railways at an average of around 3 times each or so, including known abandonded railways such as Subbetica olive train.
But the hunt must continue