The SPD images are as follows:

    balls - fractal ball object (a.k.a. sphereflake)
    gears - 3D array of interlocking gears
    mount - fractal mountain and 4 glass ball
    rings - pyramid of dodecahedral rings
    teapot - the famous teapot on a checkerboard
    tetra - recursive tetrahedra
    tree - tree

    The images for these databases and other information about them can be
found in "A Proposal for Standard Graphics Environments," IEEE Computer
Graphics and Applications, vol. 7, no. 11, November 1987, pp.  3-5.  See
IEEE CG&A, vol. 8, no. 1, January 1988, p. 18 for the correct image of the
tree database (the only difference is that the sky is blue, not orange).  The
teapot database was added later, and consists of a shiny teapot on a shiny
checkerboard.

    The SPD package is available via anonymous FTP from:

	freedom.graphics.cornell.edu [128.84.247.85]
	weedeater.math.yale.edu [130.132.23.17]
	cs.uoregon.edu [128.223.4.13]

among others.  For those without FTP access, write to the netlib automatic
mailer:  research!netlib and netlib@ornl.gov are the sites.  Send a one line
message "send index" for more information, or "send haines from graphics" for
the latest version of the SPD package.

Eric Haines (erich@eye.com)