From: Nathan Kern (
Date: Mon Jul 13 2020 - 11:29:51 CDT

Hello Soumik,

I don't know if VMD can render with a white background, however with other
image editing tools, you should be able to convert the background to alpha.

E.g., in GIMP, there is the option "Colors > Color to Alpha". If you render
with a white background then use Color to Alpha (with white as the color)
this can achieve the same effect. I assume there are other editors that
have a similar function.


On Mon, Jul 13, 2020 at 4:39 AM Soumik Ghosh <> wrote:

> Hi,
> I have been trying to map an electrostatic potential to an electron
> density of a molecule. Afterwards I want to render it. Since I cannot get
> POVRAY 3.6 to render the colours, I am using Tachyon. How do you get a
> transparent background with Tachyon as you would with the POVRAY +UA
> command?
> Thanking you in advance,
> Soumik Ghosh