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    <p>I experienced a similar issue in certain situations, where
      playing with MIS on/off helped to workaround this.</p>
    <p>Please file a bugreport.</p>
    <p><br>
    </p>
    <p>Jens<br>
    </p>
    <br>
    <div class="moz-cite-prefix">Am 12.02.2017 um 10:57 schrieb Guido
      Medici:<br>
    </div>
    <blockquote
cite="mid:CAEHcXZWQNvhu0+MkXWSQj9ZgyVX-_rNtn6FqDwkFUui1U-z4FQ@mail.gmail.com"
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          <div class="gmail_default"><font face="monospace, monospace">Hi
              everyone,</font></div>
          <div class="gmail_default"><font face="monospace, monospace">first
              of all Iíd like to thank you for all the effort you put to
              constantly develop and improve Blender and Cycles.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">Unfortunately,
              Iíve stumbled upon an issue that limits the usage of
              Cycles in complex lighting situations.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">Iíve
              tried to look for a solution on several different forums,
              but all my attempts were unsuccessful so Iíve decided to
              write to you directly.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">Iíll
              try to explain the issue as best as possible, In this
              link:</font></div>
          <div class="gmail_default"><font face="monospace, monospace"><br>
            </font></div>
          <div class="gmail_default"><font face="monospace, monospace">†<a
                moz-do-not-send="true"
href="http://blender.stackexchange.com/questions/73507/complex-lighting-situations-issues-light-intensity-decreases-number-lights-inc">http://blender.stackexchange.com/questions/73507/complex-lighting-situations-issues-light-intensity-decreases-number-lights-inc</a>†</font></div>
          <div class="gmail_default"><span
              style="font-family:monospace,monospace"><br>
            </span></div>
          <div class="gmail_default"><span
              style="font-family:monospace,monospace">you'll can find
              some pictures that better explain the problem.</span></div>
          <div class="gmail_default"><font face="monospace, monospace">I
              have noticed that the more ďlightsĒ are introduced in a
              scene (both interior and exterior) the more the intensity
              of each lamp is reduced.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">Iíve
              notices the same issue with HDRI images. Again, adding
              more sources of light into the scene, results in a
              decreased intensity of the HDRI image itself.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">Clearly,
              the problem becomes extremely limiting especially in
              situations where multiple sources of illumination are
              required.</font></div>
          <div class="gmail_default"><font face="monospace, monospace">In
              the attachments Iím showing the aforementioned issue, as
              you can see the source of lighting (in this case a simple
              Point lamp) decreases its intensity as the number lights
              increases. On every picture Iím adding one or more lamps.</font></div>
          <div class="gmail_default"><font face="monospace, monospace"><br>
            </font></div>
          <div class="gmail_default"><font face="monospace, monospace">best
              regards,</font><span
              style="font-family:monospace,monospace;font-size:12.8px">†</span></div>
        </div>
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                            <div style="font-size:12.8px"><b><font
                                  face="monospace, monospace" size="2">Guido
                                  Medici</font></b></div>
                            <div style="font-size:12.8px"><font
                                face="monospace, monospace">†</font></div>
                            <div
                              style="text-align:left;font-size:12.8px">
                              <div style="font-size:12.8px"><font
                                  color="#000000" face="monospace,
                                  monospace" size="1"><b>.......................................</b></font></div>
                            </div>
                            <div
                              style="text-align:left;font-size:12.8px"><font
                                face="monospace, monospace"><u
                                  style="color:rgb(0,0,0);font-size:x-small">GUIDO
                                  MEDICI</u><span
                                  style="font-size:12.8px">†</span></font></div>
                            <div
                              style="text-align:left;font-size:12.8px"><span
style="color:rgb(0,0,0);font-family:monospace,monospace;font-size:x-small">Via
                                Nino Cattozzo, 50, 45011 Adria (Ro)</span><br>
                            </div>
                            <div
                              style="text-align:left;font-size:12.8px"><span
style="font-family:monospace,monospace;font-size:x-small"><a
                                  moz-do-not-send="true"
                                  href="mailto:guido.medici89@gmail.com"
                                  target="_blank">guido.medici89@gmail.com</a></span></div>
                            <div style="text-align:left"><font
                                face="monospace, monospace" size="1"><a
                                  moz-do-not-send="true"
                                  href="http://www.behance.net/Guido_Medici"
                                  target="_blank">http://www.behance.net/Guido_Medici</a></font><br>
                            </div>
                            <div
                              style="text-align:left;font-size:12.8px"><span
style="color:rgb(0,0,0);font-family:monospace,monospace;font-size:x-small">P.I.
                                01488300292</span></div>
                            <div
                              style="text-align:left;font-size:12.8px"><span
style="color:rgb(0,0,0);font-family:monospace,monospace;font-size:x-small">C.F.
                                MDCGDU89A24H620U</span></div>
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                                  monospace" size="1"><b>.......................................</b></font></div>
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                              style="text-align:left;font-size:12.8px"><b><font
                                  color="#cccccc" face="arial,
                                  helvetica, sans-serif" size="1"><br>
                                </font></b></div>
                            <div
                              style="text-align:left;font-size:12.8px"><span
style="color:rgb(153,153,153);line-height:18.46px"><font
                                  face="monospace, monospace" size="1">Ai
                                  sensi del D.Lgs. 19603, le
                                  informazioni e le immagini contenute
                                  nel presente messaggio e negli
                                  eventuali allegati sono da
                                  considerarsi esclusivamente e
                                  strettamente riservati. Il
                                  destinatario Ť líunico autorizzato a
                                  leggerlo, usarlo, copiarlo e sotto la
                                  propria responsabilitŗ diffonderlo. A
                                  chi dovesse indebitamente pervenire si
                                  notifica che Ť proibito qualsiasi uso,
                                  copia, distribuzione e divulgazione di
                                  quanto in esso contenuto (art. 616
                                  c.p.). Qualora questa comunicazione
                                  fosse stata ricevuta per errore, vi
                                  invitiamo cortesemente a darcene
                                  notizia ed a provvedere alla
                                  distruzione del messaggio.</font></span></div>
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      <pre wrap="">_______________________________________________
Bf-cycles mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Bf-cycles@blender.org">Bf-cycles@blender.org</a>
<a class="moz-txt-link-freetext" href="https://lists.blender.org/mailman/listinfo/bf-cycles">https://lists.blender.org/mailman/listinfo/bf-cycles</a>
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 

Jens Verwiebe
Allerskehre 44 - 22309 Hamburg

Tel.: +49 40 68 78 50
mobile: +49 172 400 49 07
mailto: <a class="moz-txt-link-abbreviated" href="mailto:info@jensverwiebe.de">info@jensverwiebe.de</a>
web: <a class="moz-txt-link-freetext" href="http://www.jensverwiebe.de">http://www.jensverwiebe.de</a></pre>
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