If running this presentation as a Starpack, you
will see 3 buttons in the Installation and
Information menu:
These allow you to extract the Tcl3D packages,
the external libraries and the demo programs onto
the file system, so you can run Tcl3D from tclsh
or wish.

The Tcl3D package folder (tcl3d0.5.0) should be
copied into the lib directory of your Tcl 
installation.

The files contained in the external libraries
folder (extlibs) should be copied into a directory,
which is listed in your PATH environment variable
(Windows) or your LD_LIBRARY_PATH environment
variable (Unix).

The demonstration programs folder (demos) can be
copied to any convenient place of your file system.

See the Tcl3D manual for more details.