Not sure if this has already been said, but why not a way for Cycles to restart an old image render? Like you open up an old render you want to sample some more, and you enter the approximate number of samples it&#39;s already gone through, and it will continue the render.<br>
<br><div class="gmail_quote">On Tue, Nov 22, 2011 at 5:34 PM, Thomas Dinges <span dir="ltr">&lt;<a href="mailto:blender@dingto.org">blender@dingto.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    Original 1000s <a href="http://temp.dingto.org/render_seed/1000.png" target="_blank">http://temp.dingto.org/render_seed/1000.png</a><br>
    Original 2000s <a href="http://temp.dingto.org/render_seed/2000.png" target="_blank">http://temp.dingto.org/render_seed/2000.png</a><br>
    <br>
    Combined 3000s, with a Weighting of 0.66:
    <a href="http://temp.dingto.org/render_seed/3000_combined.png" target="_blank">http://temp.dingto.org/render_seed/3000_combined.png</a><br>
    <br>
    Am 22.11.2011 23:20, schrieb Jordan Miller:
    <div><div class="h5"><blockquote type="cite">
      <div>well the way to test would be to do the 3600 sample render
        and compare the results. you can do a convert to grayscale then
        Boolean subtract the two images, then invert the result to see
        pixel differences.</div>
      <div><br>
      </div>
      <div>I suspect the 3600 sample image will be superior. should be
        identical render time but require no post processing.</div>
      <div><br>
      </div>
      <div>now I want to see the image in question, too! care to post
        it?</div>
      <div><br>
        <div><span>jordan</span><br>
        </div>
        <div><br>
        </div>
        <div>
          <br>
        </div>
      </div>
      <div><br>
        On Nov 22, 2011, at 5:15 PM, Thomas Dinges &lt;<a href="mailto:blender@dingto.org" target="_blank">blender@dingto.org</a>&gt;
        wrote:<br>
        <br>
      </div>
      <blockquote type="cite">
        <div> Yes, that&#39;s what Jordan suggested. :)<br>
          This makes sense and also gives better results.<br>
          <br>
          I hope we will get a better solution though, a good merging
          system would be awesome. :) <br>
          <br>
          Am 22.11.2011 23:11, schrieb Kel M:
          <blockquote type="cite"><br>
            <br>
            <div class="gmail_quote">On Tue, Nov 22, 2011 at 4:59 PM,
              Thomas Dinges <span dir="ltr">&lt;<a href="mailto:blender@dingto.org" target="_blank">blender@dingto.org</a>&gt;</span>
              wrote:<br>
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> That
                seems to give better results, right. Still not sure
                about this.<br>
                <br>
                Am 22.11.2011 22:36, schrieb Jordan Miller:<br>
                <div>
                  <div>&gt; have you tried merging them
                    weighted (&quot;factor&quot; setting) proportionally to the
                    number of samples?<br>
                    &gt;<br>
                    &gt; jordan<br>
                    &gt;<br>
                    &gt;<br>
                    &gt;<br>
                    &gt;<br>
                    &gt;<br>
                    &gt; On Nov 22, 2011, at 4:19 PM, Thomas Dinges
                    wrote:<br>
                    &gt;<br>
                    &gt;&gt; Hi Brecht,<br>
                    &gt;&gt; I am testing the Seed function atm in the
                    Integrator panel.<br>
                    &gt;&gt;<br>
                    &gt;&gt; Am I right that images, rendered with
                    different seeds can be merged<br>
                    &gt;&gt; together?<br>
                    &gt;&gt; So for example:<br>
                    &gt;&gt; Image_1 has Seed 1 and 1000 Samples<br>
                    &gt;&gt; Image_2 has Seed 5 and 2000 Samples<br>
                    &gt;&gt;<br>
                    &gt;&gt; Do I have 3000 Samples after merging them
                    together?<br>
                    &gt;&gt; I did that in the compositor with the Mix
                    node, factor 0.5 and I used<br>
                    &gt;&gt; OpenEXR renders for it.<br>
                  </div>
                </div>
              </blockquote>
              <div><br>
                If the second image was in the second input, shouldn&#39;t
                you set the Factor to 0.66? :)<br>
                 </div>
              <blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
                <div>
                  <div> &gt;&gt; The combined result was
                    better than the single images, I have the<br>
                    &gt;&gt; impression (more noise free).<br>
                    &gt;&gt;<br>
                    &gt;&gt; Then I rendered another image with 600
                    samples, and combined it to the<br>
                    &gt;&gt; already combined result. Now I have the
                    impression though that the noise<br>
                    &gt;&gt; became more again, rather than less.<br>
                    &gt;&gt;<br>
                    &gt;&gt; So do I something wrong, or is that not
                    supposed to work the way I use<br>
                    &gt;&gt; it? :)<br>
                    &gt;&gt;<br>
                    &gt;&gt; Best regards,<br>
                    &gt;&gt; Thomas<br>
                    &gt;&gt;<br>
                    &gt;&gt; --<br>
                    &gt;&gt; Thomas Dinges<br>
                    &gt;&gt; Blender Developer, Artist and Musician<br>
                    &gt;&gt;<br>
                    &gt;&gt; <a href="http://www.dingto.org" target="_blank">www.dingto.org</a><br>
                    &gt;&gt;<br>
                    &gt;&gt;
                    _______________________________________________<br>
                    &gt;&gt; Bf-cycles mailing list<br>
                    &gt;&gt; <a href="mailto:Bf-cycles@blender.org" target="_blank">Bf-cycles@blender.org</a><br>
                    &gt;&gt; <a href="http://lists.blender.org/mailman/listinfo/bf-cycles" target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
                    &gt; _______________________________________________<br>
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                    <br>
                    <br>
                    --<br>
                    Thomas Dinges<br>
                    Blender Developer, Artist and Musician<br>
                    <br>
                    <a href="http://www.dingto.org" target="_blank">www.dingto.org</a><br>
                    <br>
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                  </div>
                </div>
              </blockquote>
            </div>
            <br>
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            <br>
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</pre>
          </blockquote>
          <br>
          <br>
          <pre cols="72">-- 
Thomas Dinges
Blender Developer, Artist and Musician

<a href="http://www.dingto.org" target="_blank">www.dingto.org</a></pre>
        </div>
      </blockquote>
      <blockquote type="cite">
        <div><span>_______________________________________________</span><br>
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      </blockquote>
      <br>
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      <br>
      <pre>_______________________________________________
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</pre>
    </blockquote>
    <br>
    <br>
    <pre cols="72">-- 
Thomas Dinges
Blender Developer, Artist and Musician

<a href="http://www.dingto.org" target="_blank">www.dingto.org</a></pre>
  </div></div></div>

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<br></blockquote></div><br>