This web page has been superceded by a more modern version of the point group renderings, using the PoVRay rendering engine. The new site, located at this link, also has renderings for the magnetic point groups.
The following modules and image archives are made available for educational purposes:
The movies can be downloaded as needed from this page,
or the entire gzipped and tarred archive can be downloaded from here
All images and individual movie frames were rendered by the Rayshade 4.0 public domain ray tracing package. If you want to create your own movies, perhaps rotating them around a different axis, or making the helices move, or ... (endless possibilities, only limited by the size of your hard drive...) then you can use this archive (32043 bytes) as a starting point. It contains the complete set of Rayshade input files, including the positions of all symmetry elements and all atoms. You are welcome to modify these files, and if you do get a nice result, please let me know about it...
The following copyright applies to all files in this distribution.
Copyright (c) 1998 Marc De Graef
All rights reserved.
Redistribution and use with or without modification, are permitted
provided that the following conditions are met:
1. Redistributions of this archive must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. The name of the Author may not be used to endorse or promote products
derived from this distribution without specific prior written permission.
In particular, commercial use of images produced from this distribution
in any form of print is not allowed, unless specific prior written permission
has been granted.
THIS DISTRIBUTION IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
And now a word about the sponsor:
The development of this program was only possible with financial help from the National Science Foundation (DMR-9501017, Bruce MacDonald program monitor).
I would welcome any kind of feedback about this distribution; in particular, I am looking for answers to the following questions: