[Chimera-users] Contouring ED Maps

[Tom Goddard]

Hi Hector,

  Not sure what "sharply chopped" means without a picture.  But we have 
seen a problem where the map surface looks like sliced bread.  It is 
caused by a bug in old Mesa OpenGL (3-d graphics) libraries on Linux, 
and is not a Chimera bug.  The solution is to install a graphics driver 
which will also give you much faster rendering.  Or you can disable 
Vertex Buffer Objects in the Chimera Debug Graphics Driver tool.

    http://plato.cgl.ucsf.edu/trac/chimera/ticket/7201

    
http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/debug/debug.html

If this is not your problem you can submit a bug report with Chimera 
menu entry Help / Report a Bug and attach an image.

  Tom


> Hi,
>
> Also regarding contouring ED maps: we have ccp4 maps that are fine in 
> coot, but as soon as you display them in chimera they are sharply 
> chopped in one direction, as if there is any problem with a border. 
> Any suggestion, the effect it's particularly bad for a surface 
> representation, but it's also obvious when you display it as a mesh.
>
> Thank you!
>
> Hector Viadiu
>

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