Hi Istvan,

With regards to CPU ray tracing only running on a single core, that sounds
like a major regression; we haven't changed anything in regards to that so
I'll investigate. As for your first issue, do you have any examples that I
can inspect myself to see what the issue is?

Jarrett J.

On Fri, Jul 19, 2024 at 6:11 PM Istvan Kolossvary <ikolos...@gmail.com>
wrote:

> Hi,
>
> I have had these issues with the new timeline. It works fine with scenes
> and short multi-state objects (like those showcased in the Pymol 3 online
> visualization course) but when it comes to real life MD trajectories I
> found two "dealbreaker" issues.
>
> 1) With complex movies based on MD trajectories and not scenes, the Draw
> mode is not working. If I select Draw to generate a movie file quickly for
> testing then (a) it takes almost as long as Ray Tracing and (b) the movie
> is complete garbage, showing only random parts of the system.
>
> 2) The Ray Tracing mode works fine, but processing time is prohibitively
> slow because Pymol 3 only uses a single CPU core for ray tracing. Pymol 2.5
> automatically uses all the available cores for ray tracing. The way Pymol 3
> is right now, it takes 24-48 hours to produce a 3000 frame movie, which is
> only 100 seconds.
>
> Has anyone encountered similar issues?
>
> Thanks,
>
>    Istvan
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-- 

*Jarrett Johnson* | Senior Developer, PyMOL
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