I find this piece in particular to be relevant to what I am basing my design from. As my chosen festival is a surfing and music festival, I think a use of watercolours would be an appropriate (and also relevant) choice for print making experimentation.
This is probably one of my personal favourites for watercolour paintings. This drawing just allows the viewer to see the great difference in contrast and tone from the light source. As you can see, the light source piercing through the windows are yellow/orange-ish whilst fading gradually to blue and dark grey. I love it!