[Chimera-users] colour with coulombic potential

Elaine Meng meng at cgl.ucsf.edu
Thu Jan 17 10:37:56 PST 2013

Hi Giulia,
Sorry, there is no "bring to front" option or ability to color only part of a surface by Coulombic ESP.

As you found out, the workaround to get partial Coulombic coloring is to use two copies of surface.  Instructions are given in this previous post:


I would recommend first experimenting to see which copy of the surface "wins" display, then using that copy for the Coulombic coloring.
I hope this helps,
Elaine C. Meng, Ph.D. 
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Jan 17, 2013, at 7:51 AM, giulia zanetti wrote:

> Hi all,
> I am trying to colour with coulombing potential only a portion of the surface I generated, and show it together with the rest of the surface, coloured in grey.
> The way I've done it is to create a duplicate of the pdb model, generate surface1 from the full model, and surface2 from the selected area, and colour with coulombic potential only surface2.
> The issue is that sometimes surface1 is "in front" of surface2, and the only way to see surface2 is to hide surface1. This is not related to the order I create the surfaces apparently, but rather to the order I created the models.
> Is there a way to "bring to front" or " send to back" surfaces or models for display purposes, rather than copying models (and re-doing the selection for the residues that I want coloured?).
> Or a way to colour with potential only the selected area of a surface?
> Thanks!
> Giulia

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