Kathmandu photography gallery is currently showing an exhibition by Kraisak Choonhavan titled Imagine The Sky (from 3rd February to 28th March).
Kraisak was a senator in the Thaksin government, and these images represent his frustration at the red tape which prevented him from generating any real changes. They were a private, stress-relieving Photoshop experiment until Kathmandu suggesting exhibiting them publicly.
Bangkok, like any city, is full of advertising billboards. Kraisak has used Photoshop to digitally remove some of this clutter and present idyllic images of an advertising-free Bangkok cityscape. He juxtaposes 'before' (real) and 'after' (Photoshopped) photographs, and the contrast is startling.
If you look up close at the 'after' images, imperfections in the digital manipulation are revealed, though the immediate effect is highly impressive. (Like Pop Art, these works should be seen from a reasonable distance, generating a sudden impact.)