Hi Joel,

> How can I extend the map around my protein as it appears to cross the
> boundaries of the asu?

You can't... easily. This is something we need to add to PyMOL. For
the time being you need to use symexp or (A>Generate>Symmetry Mates)
to extend the protein into the density. Please file this as an RFE on
the open-source tracker to help raise priority on this.

> When I ray trace, the map disappears...so we can’t use the excellent
> graphics

Due to technicalities it's disabled by default. To enable it do,

set ray_volume

before ray tracing. We still have more work to do on the volumes. And,
we _really_ appreciate feedback like this from our users--so please
keep it coming.

For a final, smoother volume-based representation you can turn up the
volume_layers setting to something like 1024 or 2048 if your video
card can handle it.

Cheers,

-- Jason

-- 
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

(e) jason.vertr...@schrodinger.com
(o) +1 (603) 374-7120

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