Casey Reas

American, born 1972

A Mathematical Theory of Communication

Inkjet print Two walls: 167 × 198.25 in.; 167.5 × 190.75 in.
Commission, Landmarks, The University of Texas at Austin, 2014
Photography not permitted
Location: North building of The Bill & Melinda Gates Computer Science Complex & Dell Computer Science Hall (GDC) GPS: 30.286389, -97.736667

More Information

Essay by Christiane Paul

Over the past fifteen years Casey Reas has emerged as one of the leading artists in the field of software art. To a considerable extent, his work has defined both the practice in this field and the theoretical discourse surrounding it. While software always remains at the center of Reas’ artistic practice, his projects have also materialized as objects and installations or prints, performative events, and stage set designs. His work has been exhibited in more than one hundred solo and group exhibitions at venues around the world, including the San Francisco Museum of Modern Art and the Art Institute of Chicago. He has also received commissions from institutions such as the Whitney Museum of American Art and the New World Symphony in Miami, where Reas created a permanent video projection for the building’s nighttime façade. Reas’ work has been collected by the Victoria and Albert Museum and the Centre Georges Pompidou, among others.

Currently a professor at the University of California, Los Angeles, Reas received a bachelor’s degree from the School of Design, Architecture, Art, and Planning at the University of Cincinnati and a master’s degree in Media Arts and Sciences from the Massachusetts Institute of Technology, where he was part of the Aesthetics and Computation Group at MIT’s Media Lab. In 2001 Reas—together with fellow MIT student Ben Fry—initiated and created Processing, an open-source programming language and visual environment for coding. Bridging the gap between programming and visual arts, Processing developed from phenomenon to revolution and is now used by artists, by visual designers, and in educational institutions around the world. Processing has been groundbreaking not only as an alternative language for expanding programming space but also as an attempt to nurture programming literacy in the broader context of art and cultural production.

Reas’ software art projects typically explore systems, specifically their emergence and underlying instructions and conditions. Instructions form the basis of all generative art, in which a process—such as a computer program, machine, or other procedural invention—is set into motion and, with some degree of autonomy, creates a work of art. This generative principle is the driving force behind Reas’ work, including his Process series (ongoing since 2005), a suite of software art that explores instruction-based visuals and the emergence of systems. Possibilities for interaction between elements are outlined in code, and structures evolve through actions and movements of the elements within the given parameters. The visuals emerging from Reas’ “processes” are often seemingly organic and sometimes vaguely reminiscent of cells and tissue; they are abstractions of systems that occur in the natural world. Reas creates a new type of image space that fuses elements of drawing and experimental animation with conceptual art.

The instruction-based nature of software points to the art-historical roots of the digital medium in Dada, Fluxus, and conceptual art, all of which placed an emphasis on the variations of formal instructions and focused on concept, event, and audience participation as opposed to art as a unified object. The layer of “code” and algorithmic instructions in digital art conceptually connects to pieces by Marcel Duchamp, John Cage, and Sol LeWitt that are based on the execution of rules. In the conceptual art of the 1960s and ‘70s, idea and concept were often more central to the work than its execution. As LeWitt famously put it: “The idea becomes a machine that makes the art.” Reas has explicitly referenced the work of LeWitt and explored the relevance of conceptual art to the idea of software art. For his Process series, he writes text descriptions outlining dynamic relationships between elements and then implements them as software. The instruction for Process 4 (Software 1), for example, reads:

A rectangular surface filled with varying sizes of Element 1. Draw a line from the centers of two Elements when they are touching. Set the value of the shortest line to black and the longest to white, with varying grays between.

In his Process Compendium (2010), Reas explains:

An Element is a simple machine that is comprised of a Form and one or more Behaviors. A Process defines an environment for Elements and determines how the relationships between the Elements are visualized. For instance, Element 1 takes the form of a circle and one of its behaviors moves it along a straight line at a constant speed. Process 4 fills a surface with Element 1 and draws a line between elements while they overlap. Each Process is a short text that defines a space to explore through multiple interpretations. A Process interpretation in software is a kinetic drawing machine with a beginning but no defined end.

As part of his project titled {Software} Structures —which was commissioned by the Whitney Museum of American Art in 2004 and comprises the first three Process works, conceived in collaboration with Jared Tarbell, Robert Hodgin, and William Ngan—Reas created, with LeWitt’s permission, digital versions of some of the artist’s Wall Drawings (nos. 85, 106, and 358) by encoding LeWitt’s instructions so that they could be rendered to the screen or even respond to interaction.

Reas’ “processes” and “software structures” are presented in different forms, ranging from screens to large-scale projections, and from prints depicting the state of the process at a specific point to interactive versions that allow the audience to draw on a touch screen with their fingers, thereby triggering automated software elements that interact with each other and create additional patterns. The different manifestations of the work illustrate that the underlying “process” transcends any specific medium.

A Mathematical Theory of Communication, 2014

The project commissioned by Landmarks—a mural on two separate walls in the The Bill & Melinda Gates Computer Science Complex & Dell Computer Science Hall titled A Mathematical Theory of Communication —is both a continuation of Reas’ previous explorations and a departure from their focus. The title is borrowed from a highly influential article (1948) by Claude Shannon titled “A Mathematical Theory of Communication.” It is considered one of the founding texts in the field of information theory. Realizing the broad applicability of his theory, Shannon expanded the text, in collaboration with Warren Weaver, and published it as a book titled The Mathematical Theory of Communication in 1949. Reas used the original title of the article to capture the visual and conceptual theory of communication unfolding in his artwork. While the title of the work suggests a technologically or scientifically driven exploration, the project itself is highly visual, experiential, and subjective in nature.

Reas’ version of a mathematical theory of communication builds upon and reworks the images he presented in his exhibition ULTRACONCENTRATED at New York’s bitforms gallery in 2013. As with A Mathematical Theory of Communication, the works in that exhibition—the Signal to Noise series, in particular—focused on mediation and perception, information systems, and communication. In Signal to Noise, television content was captured from the air with an antenna and then edited and processed with software written by Reas that ran live in the gallery. Each individual piece in the series scrambled a television segment captured from a network, such as ABC, NBC, or CBS, and amplified the flickering of data, thereby creating distorted new image spaces. Signal to Noise captured signals transmitted through the electromagnetic spectrum, pushing them to the edge of legibility.

A Mathematical Theory of Communication builds on ULTRACONCENTRATED by using images from the exhibition, yet once again transforming them into new ones. In visual terms, the project occupies a space between the instruction-based emergent systems of the Process series and the more architectural quality of the scrambled flicker of image spaces in Signal To Noise. This in-between space seems to mirror the conceptual approach of the artist, who admits that he originally felt constrained by both his work’s proximity to a LeWitt wall drawing and its position in the Computer Science building. A Mathematical Theory of Communication transcends the constraints of both conceptual art and pure information science by merging aspects of both in order to create an experiential data landscape that immerses the viewer. The visuals of the project oscillate between the familiar, recognizable, and an uncertain, constantly emerging space: they still have qualities of painterly abstraction and occasionally seem to suggest a legible original source image, yet ultimately deny legibility by putting the viewer in the middle of the computer vision algorithm that transformed the original imagery. Both murals are based on the same source image yet analyze it in different ways, once again playing with uncertainty—the threshold between similarity and difference.

While many of Reas’ previous works, such as the Process series, explored the connections between early instruction-based conceptual art and the algorithmic nature of software art, A Mathematical Theory of Communication focuses on communication and information theory as another important strand of digital art’s history. Both the kinetic art and early digital art of the 1960s and ‘70s were deeply influenced by notions of cybernetics, as well as information and systems theory. In the 1940s American mathematician Norbert Wiener (1894–1964) coined the term “cybernetics”—from the Greek term kybernetes, meaning “governor” or “steersman”—for the comparative study of different communication and control systems, such as the computer and the human brain. In Cybernetics: Or, Control and Communication in the Animal and the Machine (1948), Wiener defined three central concepts, which he maintained were crucial in any organism or system—communication, control, and feedback—and postulated that the guiding principle behind biological life and organization is the information contained in messages. Claude Shannon’s investigations of the transmission of information made a major contribution to cybernetics. He famously proposed that messages are transformed into a signal by a transmitter, then send through a channel—be it a cable or band of radio frequencies—and decoded by a receiver, and finally delivered to a destination, be it a human or machine. Reas’ project reads Shannon’s original text as philosophy and theory and visually reinterprets his theory of communication and the signal: in his murals, an original source image is “encoded” into a signal through an algorithm. As viewers of Reas’ data landscape, we become receivers who decode the imagery.

A central element in Reas’ project is the uncertainty in the perception and legibility of images. Uncertainty in the delivery of a message also plays a major role in the communication theory of Shannon, who faced a major question: How does one encode a message in such a way that its transmission rate through a “noisy” channel is maximized and the error rate minimized? For Shannon, uncertainty is a twofold operation that emerges in the concepts of both noise and entropy. Shannon’s goal was to create a more efficient signal-to-noise ratio. He believed that repeating messages in order to avoid “misreadings” would only increase the potential for even more noise and, at the same time, reduce the transmission capacity of the channel. In information theory, entropy means the average amount of information contained in each received message. Entropy thereby also becomes a measure of uncertainty: Shannon posits that the greater the number of possible messages, the greater the uncertainty. In order to solve the problem he proposed to encode messages in a way that would be tailored to the transmission capacity of the channel.

Reas’ piece by no means takes a technical approach to illustrating Shannon’s concepts, but still is conceptually informed by them. In a poetic and visual way rather than mathematical one, Reas’ A Mathematical Theory of Communication explores the uncertainties of the algorithmically processed image. Entropy, as the amount of information contained in the image, and noise, as the disturbances and glitches in the transmitted image, both create uncertainties. Reas’ two murals visually amplify how these uncertainties are an essential part of the image and the way in which the viewer receives its message. His imagery communicates its message both with fidelity (as a minimal amount of noise and distortion) and entropy: on the one hand, there is fidelity in the familiar, recognizable elements; on the other, there are uncertainties created by the many possible messages that are carried by the abstract, constantly evolving imagery. A Mathematical Theory of Communication puts viewers in the middle of the data landscape, inviting them to experience algorithms and the digital medium in both its fidelity and uncertainties. While the murals create this experience on the basis of specific imagery, they raise questions about perception that ultimately apply to any work of digital (or even visual) art: how do images communicate their message and how do we decode and perceive them?

Christiane Paul is an associate professor at the School of Media Studies, The New School, and Adjunct Curator of New Media Arts at the Whitney Museum of American Art. She has organized exhibitions in countries around the world, written extensively on new media arts, and lectures internationally on art and technology. 

Project History

A Mathematical Theory of Communication by Casey Reas bridges the gap between the technical world of programming and the visual realm of art and design. Reas employs programming as his paintbrush, allowing it to create unexpected, intricately rendered images. This project is accessible in the atrium of the Gates Dell Complex during regular building hours.

In 2013 the Chair of the Department of Computer Science, Bruce Porter, requested Landmarks assistance in acquiring art to enhance two walls in the department’s administrative and academic office suites. Landmarks identified artists whose work would complement the Sol LeWitt pieces that had been installed when the building was constructed in 2012. After reviewing a range of possibilities, Landmarks and the computer science’s project committee agreed that artist Casey Reas was the best choice for the commission.

A Mathematical Theory of Communication is composed of high-resolution digital prints on a fine art substrate proprietary to Maharam, the manufacturer and printer.

Christiane Paul, Associate Professor at the School of Media Studies, The New School, and Adjunct Curator of New Media Arts at the Whitney Museum of American Art, contributed the artist essay, which provides greater detail about Reas and his work.

Funding for this project was provided by the capital improvement project of The Bill & Melinda Gates Computer Science Complex and Dell Computer Science Hall, and with funds contributed by the Department of Computer Science. Landmarks would like to thank the department for its continued support. For their dedication and assistance, Landmarks would also like to thank Casey Reas, Steven Sacks and bitforms gallery, Bruce Porter, Patti Spencer, Adam Klivans, Lorenzo Alvisi, Matthew Walker, and Matt Larson.

Bibliographic Highlights

Graham, Beryl. New Collecting: Exhibiting and Audiences After New Media Art. Farnham, Surrey, UK: Ashgate Publishing, 2014.

Knight, Christopher. “Modern Experience, Dissected 11 Ways.” Los Angeles Times, September 30, 2005.

Rawsthorn, Alice. “A Master of Image and Information.” International Herald Tribune, October 10, 2010.

Rothenberg, David. Survival of the Beautiful: Art, Science, and Evolution. London and New York: Bloomsbury Press, 2011.

Quaranta, Domenico. In Your Computer. Brescia, Italy: Link Editions, 2011.

Reas, Casey, and Ben Fry. Processing: A Programming Handbook for Visual Designers and Artists. Cambridge: MIT Press, 2007.

Reas, Casey, Chandler McWilliams, and Lust. Form+Code in Design, Art, and Architecture. New York: Princeton Architectural Press, 2010.

Reas, Casey. Process Compendium 2004–2010. Berlin: Gallery [DAM], 2010.

Reas, Casey et al. 10 PRINT CHR$(205.5+RND); : GOTO 10. Cambridge: MIT Press, 2013.

Whitelaw, Mitchell. “System Stories and Model Worlds: A Critical Approach to Generative Art.” In Readme 100: Temporary Software Art Factory, edited by Olga Goriounova, 135–54. Norderstedt: BoD, 2005.

View Casey Reas’ website

Activity Guides

Silhouette of Mural
Casey Reas
American, born 1972
A Mathematical Theory of Communication




Subject: Balance
Activity: Create a collage using colored shapes
Materials: Construction paper, markers or colored pencils, scissors, glue
Vocabulary: Composition, balance, pattern, texture

Silhouette of Mural
Casey Reas
American, born 1972
A Mathematical Theory of Communication




Subject: Balance and movement
Activity: Design a patter using grid paper
Materials: Grid paper, ruler, compass, pencil, markers or colored pencils
Vocabulary: Composition, balance, movement

Silhouette of Mural
Casey Reas
American, born 1972
A Mathematical Theory of Communication




Subject: New media art and conceptual art
Activity: Compare the work of new media artist Casey Reas with conceptual artist Sol LeWitt
Vocabulary: Software art, conceptual art, new media art