[Chimera-users] Display at low definition

Damien Larivière damien.lariviere at fourmentinguilbert.org
Thu Dec 20 10:49:14 PST 2012


Dear Elaine, Dear Tom,

My session had many atoms effectively! I closed some models and the 
atoms got smooth again!

Many thanks for your help!

Damien


On 20/12/2012 19:40, Tom Goddard wrote:
> Hi Damien,
>
>   Check the "subdivision quality" value in the Effects dialog (menu 
> Tools / Viewing Controls / Effects).  This controls how faceted the 
> atom spheres and bond cylinders are.  The default is 1.5.  Higher 
> values give smoother appearance but the rendering can become slow 
> depending on the speed of your graphics card.  A value of 10 would be 
> high and 0.1 would be low.
>
>   There is another factor that can lead to faceted atom spheres.  If 
> you have many atoms shown as spheres then Chimera will reduce the 
> quality of the spheres so that the graphics does not become too slow.  
> The exact rule is that it won't let you use more than 4.5 million 
> triangles for the spheres of one molecule if subdivision quality is at 
> its default value of 1.5. For subdivision quality of 10 it would use 
> up to 30 million triangles (10 x 3 million).  A big sphere might use 
> about 450 triangles to look smooth, so at subdivision 1.5 you could go 
> up to 10,000 atoms shown as spheres before quality becomes limited.
>
>     Tom
>
>
>
>
> -------- Original Message --------
> Subject: [Chimera-users] Display at low definition
> From: Damien Larivière <damien.lariviere at fourmentinguilbert.org>
> To: UCSF Chimera Mailing List <chimera-users at cgl.ucsf.edu>
> Date: 12/20/12 10:15 AM
>> Dear all,
>>
>> I have a basic question:
>>
>> In the image below, on the left, the definition of the atoms is quite 
>> good, they are perfect spheres.
>>
>> On the right, they are not anymore. I probably activated something in 
>> Chimera, but I'm not able to remember.
>>
>> May you tell me what to do to get a good definition again?
>>
>> Many thanks for your help,
>>
>> Damien
>>
>>
>>
>>
>> _______________________________________________
>> Chimera-users mailing list
>> Chimera-users at cgl.ucsf.edu
>> http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users
>

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