Hi Bogdan, wonderful colorful portfolio, very creative and inspirational. While I think you have done an excellent job on most of these montages, its easy to tell you have swapped out the sky in quite a few of them. Two things I noticed are the somewhat oversharpened areas (and slight haloing) where the sky meets the land.. for me, the rolloffs are sometimes a little too abrupt, and the other thing is the colors are just a little inconsistent for me to fully buy the scene as completely "natural", with the exposure just off enough for me to question the scenes authenticity. While this creative montaging and layering definetely add drama and color to your landscapes, little things like the inconsistent angle of the light and the position of clouds tend to be a little distracting to those of us who tend to nitpick the details. In this scene, the cloud on the far left would never really be that close to the ground, another thing I noticed is that the clouds in this scene are backlit, yet the front of the building is getting bathed in sun from a different angle. Its still a much better composite than anything I could do. May I make a suggestion?... perhaps you could add a little grain to help the transitions between sky and land, and give the entire scene a little more consistency. Thanks for sharing, hope you don't mind my length comment-diatribe, but without you stating whether or not these images are composites, I have to critique them as such, cause, well, thats what I happen to see.