[Chimera-users] icosahedral annulus

[Elaine Meng]

Hi Pranav,
I believe that you can:

(1) use the "shape icosahedron" command to make an icosahedral surface
<https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/shape.html#icosahedron>

(2) then use the "mask" command specifying the map and the surface (icosahedron) that you just made
<https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/mask.html>

The mask command has a "slab" option to include some distance from both sides of the surface.

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Nov 16, 2020, at 10:29 AM, Pranav Shah <p.shah.lab at gmail.com> wrote:
> 
> Hi Elaine,
> i was wondering if there was an "easy" way to create an icosahedral
> ring-mask using chimera's shape and mask commands. At the moment, I am
> creating two icosahedral shapes of big and small radii and them
> subtracting the small one from the big one, but this results in
> inconsistent results i.e the mask does not enclose the volume I wish
> to cover.
> Best,
> Pranav