Pillars of Air and Light is based on five paintings of trees by Dutch artist Jacoba van Heemskerck (1876-1923). 

The paintings give an impression of fluidity while seeming almost rigidly geometric, and the constraints of the lines and the intuitiveness of their implementation inspired much of the music. 

I tried to evoke these ideas of structure and play, along with the mixed sense of contemplation and exuberance I get from spending the day in a forest.