From: Vermaas, Josh (
Date: Tue Mar 02 2021 - 15:17:59 CST

Hi Felipe,

.tga files can’t do transparency. .png files can though, and it looks like POV-Ray is being told to write a .png based on your command, so I don’t know what’s up, since you also have the +ua argument folks say is essential:*3C59dbba2b**3E/__;JSUl!!DZ3fjg!sXtoTZWxyVOoJFd6yhSYMYD5WGQ5FlFdp19IBsiFoenHmvXykCSgQMAX7NQdqZc1eQ$

For my own rendering purposes, I use OptiX, with the options John laid out here:


From: <> on behalf of "Pacci Evaristo, Felipe Fabricio" <>
Date: Tuesday, March 2, 2021 at 3:18 PM
To: "" <>
Subject: vmd-l: Render image background-free

Hi there,

I've been trying to solve this problem for a while now. I'm on macOS Catalina. I've been trying to render an image background-free on VMD. I've been trying to use POV-Ray for that. I found tutorials where people have used the following line in the Render Command box in the GUI interface (except for the link to the POV-Ray executable):

'/Users/felipepacci/Downloads/PovrayCommandLineMacV2//Povray37UnofficialMacCmd' +W%w +H%h -I%s -O%s.png +D +X +A +FN +UA -res 1600 900

This render does produce a .pov file; however, when I try to render it into a .tga file in POV-Ray, the output .tga image still contains a background. Am I missing something really obvious here?

I'm open to other methods that don't include POV-Ray to generate my background-free image.

Thank you beforehand for any help provided,

Felipe Fabricio Pacci Evaristo
Mobile: +1(773)569-2978
Skype: felipepacci