Baby, the pic is about the confrontation scene, not the reunion scene, even with the Polaroids there. Read the letter. It's Jack talking to Ennis, writing the same words he said last time they saw each other. That's why it's so sad. It's like he was saying goodbye, you know? He also sent the pics to Ennis, like trying to make him remember all the beautiful things they had once (the joy of the reunion, Brokeback mountain) and wrote I am so sorry. And the paper is wet because of his tears. :\'( :\'( :\'(
Glad you like it. 
Well,I haven't could read the letter,maybe because I'm as blind as a bat...

As a matter of fact,I was referring in my post to the pic,that is from the reunion scene,and the feelings they must have during it,and that the colour increased.That's all.I know,I know,I should wear new glasses...

Thank you.