When both users indicate their presence, the lampshade becomes a collaborative decoration. Users choose the appearance of their own lampshade by selecting a solid color for the upper region and a foreground image for the lower region of the shade. This foreground image is the user’s representation in the upper region on the remote user’s lamp.
Source: Hindus, D., Mainwaring, S. D., Leduc, N., Hagström, A. E., and Bayley, O. 2001. Casablanca: Designing Social Communication Devices for the Home. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI’01). ACM Press, 325–332.
