An
alternate version with a tear does exist, but it doesn't have anything to do with the photo that Prompto takes of the dress. As you can see in that video, it happened with a different picture entirely, and other players reported months ago getting it with pictures that weren't even taken in Altissia.
The stock photo of the dress also doesn't get any special attention when selecting it. It elicits the same generic comments as other stock photos (e.g. "Really takes you back, doesn't it? Makes you think about everything that came before, and after, too"). The photo in that video I linked above was also a stock photo, so I don't think whatever triggered the difference has anything to do with the final photo selection. It's either a version update difference and/or has something to do with the replies Noctis sends to Lunafreya in the notebook.
I'm leaning toward it being a possible combination of a version update difference and the notebook selections, as it isn't simply a version difference. There was another notable difference in the ending that was simply a matter of whether the player had updated the game.
The original final camp scene has Noctis remain in his chair when he tells his bros "Well, what can I say? You guys...are the best," with the camera slowly panning up away from the shot of all of them as he says it (see
this video; the scene begins at 18:23, and the specific part under observation takes place at 20:36). In updated versions, though, Noct stands to deliver this declaration, the camera focuses on his face, and it then cuts to black after he says "You guys..." -- leaving "...are the best" to be said after a cut rather than the slow drift to black in the original version of the scene (see
this video to compare with the other I posted).
There was also a notable difference in Version 1.00 experienced at the end of Chapter 13 (go to 12:20:00 in
this video from the same player as the other 1.00 recording to see/hear it). In the original version, Bahamut spoke in the language of the gods. It was only after Version 1.01 was applied that he began speaking the common language.
You'll notice, though, that despite this player getting Bahamut's original voice and the original final camp scene, they don't have Luna crying at the end of their playthrough.
Others have tried reproducing this teary ending post-Version 1.00 with consideration given to the various notebook responses or pictures selected, but no one else has been able to succeed in anything but Version 1.00 as far as I'm aware.
The fact that the only video we have of this was recorded with a webcam or something similar also suggests to me that this player may not have been playing with their game updated. Whatever other requirements may be involved remain unknown to me.
Now that it's possible to actually take pictures of Lunafreya with the flying Armiger glitch, though, I do wonder what comments the bros would give.
Probably something generic and profoundly disappointing. =P
