Originally posted by AgentSmith
Why is that nearly every time I write something, everyone ignores it and then someone else says it 20 minutes later? Does no one read my posts or
something? Does everyone ignore me? I'm not that bad am I? 
I feel like that most of the time when I post something here
minniescar: Like some others have already said. The location was found by page 2. We did what the guy asked. Some of us questioned the
authenticity of the photo, because frankly it looks like sh!t... in my opinion.
phreak_of_nature: Well all digital images consist of pixels. But what
kinglizard is pointing out are .jpg compression artifacts and how
they are inconsistant with the rest of the sky. The way .jpg compression works is that it will take one pixel and look at the ones around it. If the
colours are similar to the original pixel, it will change all those pixels to the same colour. The fewer number of colour information you need to
store, the smaller the file size.
So when your compressing an image that consists of a lot of blue sky. It's going to compress it all fairly consistanly. There is no reason why it
would compress one area of the sky completely differnt. The only time when you get a noticeable change in compression artifacts is when you get two
differnt colours next to eachother. It usually is quite noticeable in highly compressed images.
What i'd say happened in that corner of the image is that some one took a partly compressed image. Decided to remove something from that area of the
sky, like a cloud or something. Filled in the hole with the gradient tool and resaved it, thus amplifying the already compressed part, where as the
uncompressed gradient gets only partly compressed and you get a mismatch in compression artifacts.
Either way it would be nice to get an explination from either
Simon or this
DrJim person.
