Hi Tom,

Interesting, changing the lighting to "simple" does cut the 3D GPU usage by ~50% but doesn't increase the pace of coordset advancement (~7 frames per second).

Thanks,

Chad

From: Tom Goddard <goddard@sonic.net>
Sent: Friday, September 27, 2024 4:49 PM
To: Altobelli, Chad <Chad.Altobelli@ucsf.edu>
Cc: chimerax-users@cgl.ucsf.edu <chimerax-users@cgl.ucsf.edu>
Subject: Re: [chimerax-users] Increasing ChimeraX speed?

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Hi Chad,

The problem is probably you are using "soft" or "full" lighting which computes ambient shadows from 64 directiions each time the shape of the protein changes. That is done on the graphics card and is time consuming. Switch to simple lighting (command "light simple") or use the icon in the toolbar.

Tom

On Sep 27, 2024, at 4:41 PM, Altobelli, Chad via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hi,

I love using ChimeraX to make morphs, but my protein is quite a large hexamer (500kda) and the progression through the coordset can be quite slow during playback. When I look at my Windows taskmanager, I can see that neither my CPU (12^th Gen Intel i7-12700H), RAM, or GPU (NVIDIA RTX 3050 Laptop) are maxed out.

Is there a way to speed up Chimera morphs?

Thanks,

Chad
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