A plugin for Quartz Composer to misrepresent pixel-buffer data on the GPU.
See also:
http://kriss.cx/tom/2010/09/gl-pbo-glitch/
http://www.opengl.org/sdk/docs/man/xhtml/glTexImage2D.xml
http://rosa-menkman.blogspot.com/2010/08/vernacular-of-file-formats-2-workshop.html pp 3-5