jongaus

The next example: The green channel is increased by 10%. Surprisingly, on my screen the sky is lighter, but not more greenish:

Here are som examples. First raw conversions from ViewNX2, DxO with no corrections, and ACR with default settings. The sky is different, but on my screen these are variations of blue with little green impression:

I find this discussion interesting, and don't mind at all that you use my photo as a demonstration. On the contrary. Of course I see the differences, but I don't see much green(!). On your upper example (3rd attempt), it seems your version has more red in it, making the sky leaning slightly towards violet on my screen. On your first attempt, your version is clearer blue, and you are probably right there are less green in the sky.

The question is of course how the computers render these colors, and in addition how the colors are perceived by the viewers. Since I don't see much green in this sky, I'm quite sure my computer renders less green than yours. (I'm normally quite "sensitive" green, and can claim a color being green while my friends disagree.) I always save my photos with sRGB color profiles. My laptop is also set up with an sRGB driver for this computer model ("sRGB Amilo Pa1510"). Still, my computer is getting old, I guess it's about four years old, and I don't use any external, high quality screen. However, I normally check the rendering of my recent postings on my job computer, which is equipped with an external LCD screen. This quality check is of limited value though, since this screen also is about four years old, and of mediocre quality. 

Now what I wonder, is this: Will a slightly change in color on one computer be rendered as a big change on another computer? I will come back later and make some examples, to try to figure out where our perceiving of blue change to perceiving of green. I could for example use the raw data file (NEF) and convert it in three different ways: By Nikon sw, by DxO and by Adobe (ACR). They will all produce different results. Then I could play with one of the Jpeg files and reduce red and blue, and/or increase green, and see at which point the sky turns greenish. I'll come back to this later. 

Very well composed patterns and human figures. Looks almost too perfect to be arbitrary - it seems you have commanded both the people, the shadows and the reflections to react on you directions! Well done.

Thanks for your comments, Markku. I don't know about a greenish sky, on my laptop it's quite clear blue. I tried to find one of yours having about the same hue, for example this one:

http://photo.net/photodb/photo?photo_id=11403490

I'm afraid I did not take many shots outside this modern, huge church, but there may follow one or two from the interior later.

Yes, very nice indeed.

I like this! I "read" it as an abstract, with interesting colored patterns successfully positioned within the surface of the photo.  

I think this is an interesting photo, which would be an even more "cleaner" abstract if cropped just slightly, see attached suggestion. You could even consider to completely remove the white area (a picture?) top right. The photo has a green cast that contributes to the surrealistic expression.

Very elegant!

A very good portrait with a strong expression. The light and colors contribute to the mood of the photo.

Interesting. Don't think I've seen a smoke photo like this before. Looks like a color chalk drawing.

Great photo! Beautiful pose and a great expression. A very good composition.

Congratulation with the PoW! It's well deserved. You have a strong, personal signature, easily recognizable. The selected photo is an excellent representative. Your photos have been a great pleasure for me for several years.

An excellent shot: Great composition, great colors, great pose!

A good shot, the scene is really quite African, in my opinion. I'm visiting Expo in October, were there any pavilions you found specially interesting?