Geometry: dancer and pyramid
Dancer (Katja) in front of the Louvre pyramid, as the sun is setting down behind. Here, I wanted to mix geometry from a human element with the geometrical architecture of the Louvre pyramid. I aligned the small pyramid in front of the big one to emphasize geometry and symmetry.
I did the post-processing mostly in darktable. First I did a gradient of exposure in the bottom of the image, making the lower foreground part darker. I also added a local contrast filter on this foreground to highlight the texture of the ground, as well as on the center of the pyramid, to make the grid of the pyramid stand out. I used color correction to make the highlights more pink and the shadows more blue. I tuned the tone curve in the center of the image (around the dancer) to make the dancer darker and the background lighter. Finally, I used a bit of vignetting, making the corner of the image darker.
I then turned to compositing with the gimp, to blend with multiple images. I used two additional layer, overlaying other pictures and editing the layer mask to blend where I wanted. I blended with another picture taken at the same spot a bit earlier to partly erase the man in the background on the left. I also added the clouds as on the original image there were none. I use a picture taken from the same spot on another day with beautiful clouds and added it making it more transparent close to the pyramid and less on the sides (a vignetting or framing effect).