Example Tags :

transfer function | volume rendering | scalar field | vector field | graphics hardware |

Versus :

volume vs. isosurface | hardware vs. software |

You can use the dataset and the result of your search freely in your work, in exchange for your acknowledgement, something like this:
Vis4Vis (dataset | graph) courtesy of Carlos Correa at the Visualization and Interface Design Innovation laboratory, University of California at Davis.
http://vis.cs.ucdavis.edu/~correac/v4v
The Vis4Vis dataset and visualizations are intended for educational and research purposes only.