[Image: 1970s collaboration facsimile] From Art and Electronic Media Online Companion directed by Edward Shanken: Composite Fax Image by Lief Brush, Sonia Sheridan, and Willard Van De Bogartage
I love these paper posters because of the use of colour and angles. The paper adds layers and a small 3D effect because of the way you can see the paper is laid over one another. I think the different colour papers work well and could work for a key code.
Nidi Natsumatsuri Exhibition (Group Show） by Grace Lee, via Behance