From: John Stone (
Date: Wed Oct 15 2014 - 22:03:09 CDT

  Ray tracers don't like lines or points, because they are
infinitesimal objects that don't have a width, and such an
object can't ever be hit by a ray... VMD tries to emulate
lines and points by drawing very thin cylinders and spheres,
but there's a limit to the efficacy of this approach, and in
general it is best to draw cylinders and spheres rather than
lines and points when working with ray tracers... Lines and
points are really only useful in the context of rasterization
where they bear some relationship to the pixel grid of the

  John Stone

On Wed, Oct 15, 2014 at 08:46:05PM -0600, Eric Smoll wrote:
> Hello VMD users,
> Lines generated with "graphics top line {# # #} {# # #} width 2" show up
> in theA OpenGL display but are not rendered with a command like "render
> POV3 name.pov povray +W# +H# -Iname.pov -Oname.png +D +X +A +FN" Is there
> some reason why this would fail?
> Best,
> Eric

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