The skylight above an underground corridor connecting two parts of Kennedy Station (Toronto) will have a transparent spectrum of leaves printed onto it, thereby turning it into a giant projector. When the sun shines through it will cast the pattern, in varying degrees of sharpness, into the corridor beneath. The "hedge" will slowly move with the sun, and its position will change with the seasons. Ultimately, the concept is about perception, stability and change over time.
The leaves that make up the hedge have been collaged into a gradient by the artist. The images come from a Common Laurel, a bush traditionally pruned into rectangular walls in English gardens. One bush in Regent's Park, London was photographed over the course of months to produce a gradient of green based on different times of day and weather conditions. The rearrangement is an absurd temporal cubism--an attempt to see something from every point in time. The corridor will also contain vertical lights, that are part of the overall subway design vision, that will be augmented with a folliage gradient. The official list of artists can be found here.