The suggestion with pfilt=-a did work. Thank you Ignacio very much. Thank you also Greg for the theoritical backround.<br><br><br><br><div class="gmail_quote">2009/8/24 Greg Ward <span dir="ltr"><<a href="mailto:gregoryjward@gmail.com">gregoryjward@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div style=""><div>This is the error you get when your picture contains nothing but zero pixels. See earlier responses to your queries as to why.</div>
<div><br></div><div>-Greg</div><br><blockquote type="cite"><div><p style="margin: 0px 0px 0px 37px; text-indent: -37px;"><font style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal; color: rgb(0, 0, 0);" size="3" color="#000000" face="Helvetica"><b>From: </b></font><font style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal;" size="3" face="Helvetica">Σωτήρης Παπαντωνίου <<a href="mailto:sotos.enveng@gmail.com" target="_blank">sotos.enveng@gmail.com</a>></font></p>
<p style="margin: 0px 0px 0px 34px; text-indent: -34px;"><font style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal; color: rgb(0, 0, 0);" size="3" color="#000000" face="Helvetica"><b>Date: </b></font><font style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal;" size="3" face="Helvetica">August 24, 2009 5:54:04 AM PDT</font></p>
<p style="margin: 0px 0px 0px 21px; text-indent: -21px;"><font color="#000000"><b><br></b></font></p></div></blockquote><div><div></div><div class="h5"><blockquote type="cite"><div class="gmail_quote"><br>Hello list,<br>
<br>I am trying to simulate a scene of light source behind a glass. The image is part of a general simulation. <br><br>When I am trying to simulate the results are the following:<br> <br>pfilt: picture too dark or too bright<br>
rad: error filtering view sun<br> lab_6i2_sun.pic removed<br><br>If you have any idea, it would be highly appreciated<br><br>Thank you<br><br>Sotiris Papantoniou<br><br>P.S. I am sending the files of the simulation to help.</div>
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