[Chimera-users] Ray Tracing Transparent Surfaces

Tom Goddard goddard at sonic.net
Tue Feb 22 09:39:15 PST 2011

Maybe this is a bug in an older Chimera version.  I also tried 
raytracing a movie with a transparent surface fading in in Chimera 1.5.2 
and it worked.


> Hi Damian,
> It is definitely possible, and should happen without your changing any settings -- it just takes longer to raytrace when something is transparent.  I tried it just now in version 1.5.2 and a recent daily build, and the raytraced surface was indeed transparent.
> <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/raytracing.html>
> Unfortunately I don't know what may be happening on your system, or how to get around it.  Our main graphics expert is gone this week, but perhaps some of the others will have suggestions.
> Elaine
> ----------
> Elaine C. Meng, Ph.D.
> UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
> On Feb 21, 2011, at 12:23 PM, Damian Ekiert wrote:
>> Hello,
>> Is it possible to raytrace a transparent surface in Chimera?  I tried raytracing the frames of a movie where I fade in a surface, but the surface just appears abruptly, solid and black, then fades to the desired colors as the transparency approaches zero.
>> Do I need to fiddle with the POVray settings or what?
>> Any suggestions/work-arounds would be appreciated!
>> Thanks,
>> Damian Ekiert

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