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\margl40
\margr40
\f0\b0\i0\ulnone\ql\fs24\fi0\li0\gray0\fc0\cf0\up0\dn0 This is a cube with charges on each corner. 4 corners have +1 charge and the other 4 have -1/2 charge. This plot shows 3 contour levels in the electric field around this structure.\
\
Note that in the rendered output (on the web page) the white layer is semi-transparent so you can see the red layer inside. Interactive renderman doesn't support transparency, so that view is not possible interactively. You can see the rendered view again by using the File->3D View->Preview menu item.
}