From: John Stone (
Date: Fri Feb 20 2009 - 18:14:32 CST

  The main thing I'd need to do is add support for an output file format
that supports an alpha channel to Tachyon. I probably won't get to
this before VMD 1.8.7 is released, but if I do I'll let you know.
You should already be able to generate figures with transparent
backgrounds if you render with POV-Ray or Rayshade.

  John Stone

On Fri, Feb 20, 2009 at 03:39:17PM -0500, Axel Kohlmeyer wrote:
> On Fri, 20 Feb 2009, James Rustad wrote:
> JR> Dear VMD users:
> JR>
> JR> I know the issue of "transparent background" or, I guess, "no background"
> JR> has appeared before (Feb, 2007),
> JR> and in the last message it sounded as if a transparent background feature
> JR> was going to be implemented in 1.8.6.
> JR>
> JR> I have this version, and can't seem to find it. Does anyone know if it was
> JR> implemented, and
> JR> if so, how to activate it
> no, it hasn't been implemented, yet.
> you still have to use the greenscreen/bluescreen method.
> john mentioned in a private conversation recently, that
> he might implement alpha channel support into tachyon,
> but i don't expect that to happen very soon.
> cheers,
> axel.
> JR>
> JR> As Ever,
> JR>
> JR> Jim Rustad
> JR>
> --
> =======================================================================
> Axel Kohlmeyer
> Center for Molecular Modeling -- University of Pennsylvania
> Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
> tel: 1-215-898-1582, fax: 1-215-573-6233, office-tel: 1-215-898-5425
> =======================================================================
> If you make something idiot-proof, the universe creates a better idiot.

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