Beach Chair was a short computer animation

Computer animation

Computer animation is the process used for generating animated images by using computer graphics. The more general term computer generated imagery encompasses both static scenes and dynamic images, while computer animation only refers to moving images....

 test clip created by animator Eben Ostby for Pixar

Pixar

Pixar Animation Studios, pronounced , is an American computer animation film studio based in Emeryville, California. The studio has earned 26 Academy Awards, seven Golden Globes, and three Grammy Awards, among many other awards and acknowledgments. Its films have made over $6.3 billion worldwide...

 in 1986. It depicts a chair walking across the sand, dipping its leg into the water, and then moving along. Ostby made the project, with the feedback of John Lasseter

John Lasseter

John Alan Lasseter is an American animator, director and the chief creative officer at Pixar and Walt Disney Animation Studios. He is also currently the Principal Creative Advisor for Walt Disney Imagineering....

, to work out details of rendering

Rendering (computer graphics)

Rendering is the process of generating an image from a model , by means of computer programs. A scene file contains objects in a strictly defined language or data structure; it would contain geometry, viewpoint, texture, lighting, and shading information as a description of the virtual scene...

 software. It was exhibited at SIGGRAPH

SIGGRAPH

SIGGRAPH is the name of the annual conference on computer graphics convened by the ACM SIGGRAPH organization. The first SIGGRAPH conference was in 1974. The conference is attended by tens of thousands of computer professionals...

 in Dallas in 1986, along with Lasseter's landmark computer-animated short Luxo Jr.

Luxo Jr.

Luxo Jr. is the first film produced in 1986 by Pixar Animation Studios, following its establishment as an independent film studio. It is a computer-animated short film , demonstrating the kind of things the newly-established company was capable of producing...

and another test project, Flag and Waves by Bill Reeves

William Reeves

William "Bill" Reeves is a pioneer in the field of computer graphics. He was the technical director who worked with John Lasseter on the animation breakthrough shorts: Luxo Jr and The Adventures of André and Wally B.....

.

Trivia

• Beach Chair can also be found as an Easter egg
  Easter egg (media)
  Image:Carl Oswald Rostosky - Zwei Kaninchen und ein Igel 1861.jpg|250px|thumb|right|Example of Easter egg hidden within imagerect 467 383 539 434 desc none...
  
   in Pixar Short Films Collection – Volume 1.