This picture was created by François Morellet by rotating grids at the angles given in the title. The artist defined a method which was then carried out strictly, without subjective interference. Morellet experimented for a lengthy period using graphite pencil on paper, before he arrived at results which were realised on bigger scale. One observer described the visual effect, when looking at the image for a while, as 'like watching the night sky' in a cloudless night.

This image published courtesy MSU Zagreb, copyright is with the artist, please do not republish without permission. This image is used as an illustration in Art as Visual Research.