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<strong class="NavBar">POV-Ray 3.6 for UNIX documentation</strong><br> <strong>1.3.7
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<h3><a name="s01_03_07">1.3.7 </a>POV-Ray for Unix Tips</h3>
<h4><a name="s01_03_07_01">1.3.7.1 </a>Automated execution</h4>
<p>
POV-Ray for Unix is well suited for automated execution, for example, for rendering diagrams displaying statistical
data on a regular basis or similar things.
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<p>
POV-Ray can also write its image output directly to stdout. Therefore the image data can be piped in another
program for further processing. To do this the special output filename '-' needs to be specified. For instance:
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<pre>
povray -iscene.pov +fp -o- | cjpeg > scene.jpg
</pre>
<p>
will pass the image data to the <code>cjpeg</code> utility which writes the image in the JPEG format.
</p>
<p>
The text output of POV-Ray is always written to stderr, it can be redirected to a file with (using a
Bourne-compatible shell):
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povray [Options] 2> log.txt
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See also <a href="s_95.html#s03_01_02_07_03">Directing Text Streams to Files</a>.
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For remote execution of POV-Ray, as for example in a rendering service on the web, make sure you read and comply
with the <a href="s_87.html#s02_05_01">POV-Ray Legal Document</a>.
</p>
<h4><a name="s01_03_07_02">1.3.7.2 </a>Post-processing Images</h4>
<p>
For Unix systems, the PBM utilities (<a href="http://www.acme.com/software/pbmplus" target="new">PBMPLUS</a>, <a href="http://netpbm.sourceforge.net" target="new">NetPBM</a>)
and <a href="http://www.imagemagick.org" target="new">ImageMagick</a> are an excellent choice for post-processing
utilities, especially if you only have a command-line interface to Unix.
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