VMD-L Mailing List

From: Bongkeun Kim (bkim_at_chem.ucsb.edu)
Date: Wed Apr 06 2011 - 11:51:43 CDT

Thank you.
Turning off the depthcue works well.
Bongkeun Kim

Quoting John Stone <johns_at_ks.uiuc.edu>:

>
> Hi,
> Nothing has changed with how VMD 1.9 renders scenes to POV-Ray, but
> one thing that is different now is that when VMD starts up, the
> depth cueing feature is enabled by default. You can turn off depth cueing,
> and then you should get images that look the way you expect them to. The
> reason that you get a black background with depth cueing enabled is that
> the "fog" effect is causing all of the pixels to be assigned to the fog
> color (the background color in the case of VMD) because they are at
> "infinite" distance, so they are fully saturated. If you disable depth
> cueing, then any pixel that doesn't show molecular geometry should be
> entirely transparent, and the alpha values should be set as you expect for
> transparent objects in the scene...
>
> Let me know if you have further questions about this.
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Tue, Apr 05, 2011 at 11:22:21PM -0700, Bongkeun Kim wrote:
>> Hello,
>>
>> I had no problem to render images with transparent background with
>> povray 3.6 and vmd 1.8.7. In povray, I used "+FN +UA" options to
>> generate transparent png file.
>> But this is not working anymore after installing VMD 1.9. Pov-ray
>> always renders black background ignoring +UA option.
>> Do you know how I can solve this problem?
>> This problem was originated from 1.9 beta.
>> Thank you.
>> Bongkeun Kim
>> bkim_at_chem.ucsb.edu
>>
>
> --
> NIH Resource for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> Email: johns_at_ks.uiuc.edu Phone: 217-244-3349
> WWW: http://www.ks.uiuc.edu/~johns/ Fax: 217-244-6078
>