nice. It's not even necessary to decompress, PyMOL loads the gz file 
directly.

unset normalize_ccp4_maps
load \
   http://3vee.molmovdb.org/output/12jan07/d14/2xwu-12jan07.d14.mrc.gz, \
   vvv_map, format=ccp4
isomesh vvv_mesh, vvv_map, 0.01

I first tried one of the "Recent runs" examples but it didn't work, 
until I found that there is a "PyMOL compatible" checkbox on the Volume 
Calculation page. It says PyMOL requires floats, would it be difficult 
to support integer values with PyMOL as well?

Cheers,
   Thomas

Jason Vertrees wrote, On 01/06/12 22:21:
> Hi Maximillian,
> 
>> I am using the webtool http://3vee.molmovdb.org/index.php. The density map
>> is in a file format called MRC (I guess it is re-formated by the webtool in
>> a MRC file compatible to pymol at least this is what it says), which if I
>> understand it correctly is a similar file format as CCP4. However, I can't
>>  isomesh the map. Does anybody knows how to compute MRC files from voss
> 
> 
> I just tried this and the volumes look great. This looks like a really
> useful web-based tool. Here's how to do it.
> 
> Download their file and decompress it: gunzip yourFile.mrc.gz. Then
> load it into PyMOL as:
> 
> load yourFile.mrc, format=ccp4
> 
> The map data are most likely not a normal distribution, so I suggest
> unsetting normalize_ccp4_maps, before loading:
> 
> unset normalize_ccp4_maps
> 
> At this point, the idea of a map "level" is no longer valid (since the
> maps are not normalized). But, that's the only way to change the
> representation, so use the 'isolevel' command
> (http://www.pymolwiki.org/index.php/Isolevel).
> 
> This should be documented on the PyMOLWiki somewhere under 3rd Party
> Tools (or web servers).
> 
> Cheers,
> 
> -- Jason

-- 
Thomas Holder
MPI for Developmental Biology
Spemannstr. 35
D-72076 Tübingen

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