Hi Jianhao,
The “scolor” command does several types of surface coloring, including the radial coloring you describe.  See the “scolor” manual page, “geometry radial” option.  The second example near the top of the page uses this option.

<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/scolor.html>
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/scolor.html#radial>

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


> On Aug 21, 2017, at 8:51 PM, C.J. <biocjh@gmail.com> wrote:
>

> Dear specialists,
>
> I want to color spherical slices of different radius of my EM map in command line/script. How to set the "surface color" dialog in command-line?
> If anyone could give me a example? Thank you!
>
> Best regards!
> Jianhao