document.write("<script language=\"javascript1.2\" type=\"text/javascript\">function emo_pop() {window.open('http://www.haloscan.com/commenthelp.php','Help','width=200,height=360,resizable=yes,scrollbars=yes');}</script><table width=\"97%\" align=\"center\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\" class=\"MainTable\">  <tr>    <td>    <div align=\"center\"><p>Brazil r/s V2 Field Guide</p>    </div>    </td>  </tr><tr><td class=\"MessageCell\">    <a name=\"153745\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=f49944894e46b6be120f1f7748b1def0&amp;default=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FG%2F01%2Fx-locale%2Fcommon%2Ftransparent-pixel.gif&amp;rating=PG&amp;size=32\" alt=\"Gravatar\" title=\"Gravatar\" style=\"padding: 1px; margin: 2px; float: right;\" class=\"gravatar\" />We either need a way to describe the special case of face pairs to the renderer, or these internal ray hits need to be done with a custom shader.  I could see benefits of both.<br /><span class=\"byline\">           Ben L | <a href=\"http://www.anatomicaltravel.com/research\" title=\"http://www.anatomicaltravel.com/research\">Homepage</a> | 05.01.09 - 7:04 am | <a href=\"#153745\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"154092\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=4767f2dd5db064eb95551bc0e94a7cb0&amp;default=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FG%2F01%2Fx-locale%2Fcommon%2Ftransparent-pixel.gif&amp;rating=PG&amp;size=32\" alt=\"Gravatar\" title=\"Gravatar\" style=\"padding: 1px; margin: 2px; float: right;\" class=\"gravatar\" />I´m sorry but can you explain this a bit more for me? I´m not sure what exactly do you mean so it is hard for me to understad.<br><br>Pavel<br /><span class=\"byline\">           Pavel Romsy | <a href=\"http://www.michellebivotti.com\" title=\"http://www.michellebivotti.com\">Homepage</a> | 05.12.09 - 6:10 am | <a href=\"#154092\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"154658\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=d41d8cd98f00b204e9800998ecf8427e&amp;default=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FG%2F01%2Fx-locale%2Fcommon%2Ftransparent-pixel.gif&amp;rating=PG&amp;size=32\" alt=\"Gravatar\" title=\"Gravatar\" style=\"padding: 1px; margin: 2px; float: right;\" class=\"gravatar\" />The problem is that \"In the real world\" works for this case, but not for all.  What if there really was no gap, like in the case where a glass is filled with water with ice cubes floating in it?  That's \"in the real world\" too, but won't be helped by this workaround.  There needs to be a special way for this to be handled.<br /><span class=\"byline\">           Chad | <a href=\"http://www.anatomicaltravel.comresearch\" title=\"http://www.anatomicaltravel.comresearch\">Homepage</a> | 05.26.09 - 7:39 am | <a href=\"#154658\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"163575\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=d41d8cd98f00b204e9800998ecf8427e&amp;default=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FG%2F01%2Fx-locale%2Fcommon%2Ftransparent-pixel.gif&amp;rating=PG&amp;size=32\" alt=\"Gravatar\" title=\"Gravatar\" style=\"padding: 1px; margin: 2px; float: right;\" class=\"gravatar\" />Actually there is a 4th way, and following the Pavel's examples it would consist on keeping the panels facing and remove one of the two faces. <br><br>\"Liquid in a glass\" sample is a bit like this, plus having to make some ior math, but results are superb.<br>This thread by Richard Annema should be very clear, and there's also a great tutorial on b2 manual.<br><a href='http://splutterfish.com/forums/showthread.php?t=17288' rel='nofollow' target='_blank'>http://splutterfish.com/forums/s...ead.php?t=17288</a><br /><span class=\"byline\">           zemmuonne | 09.22.09 - 5:27 am | <a href=\"#163575\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"163956\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=be314c33031867ba99c6c68b9b009462&amp;default=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FG%2F01%2Fx-locale%2Fcommon%2Ftransparent-pixel.gif&amp;rating=PG&amp;size=32\" alt=\"Gravatar\" title=\"Gravatar\" style=\"padding: 1px; margin: 2px; float: right;\" class=\"gravatar\" />But what of the absorption?<br /><span class=\"byline\">           Chad | <a href=\"http://www.anatomicaltravel.com/research/\" title=\"http://www.anatomicaltravel.com/research/\">Homepage</a> | 09.29.09 - 12:47 pm | <a href=\"#163956\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr>    <td class=\"InputCell\">                  <div id=\"newcomment\"></div><form method=\"post\" name=\"addComment\" action=\"http://www.haloscan.com/comments/cptvideo2/5995555726988678933/\" target=\"_self\">        <p>    Name: <br />          <input name=\"name\" type=\"text\" size=\"38\" value=\"\" /><br />          Email:<br />          <input name=\"email\" type=\"text\" size=\"38\" value=\"\" /><br />          URL: <br />          <input name=\"url\" type=\"text\" size=\"38\" value=\"\" /><br />          Comment:&nbsp;&nbsp;<a href=\"javascript:emo_pop()\" title=\"Smiley and tag help\" target=\"_self\">?</a>&nbsp;<br />          <textarea name=\"addMessage\" rows=\"12\" cols=\"38\"></textarea><br /><input type=\"checkbox\" name=\"subscribe\" id=\"subscribe\" value=\"1\" /><label for=\"subscribe\">Notify me of followup comments via email</label>        </p>        <p class=\"PSubmit\"><input name=\"submit\" type=\"submit\" value=\"Publish\" style=\"font-weight: bold;\" class=\"SubmitButton\" />&nbsp;<input name=\"previewMessage\" type=\"submit\" value=\"Preview\" class=\"SubmitButton\" />        </p>      <input type='hidden' name='user' value='cptvideo2' /><input type='hidden' name='comment' value='5995555726988678933' /></form>    </td></tr>  <tr>    <td><p align=\"center\">        Commenting by <a href=\"http://www.haloscan.com/\" target=\"_blank\">HaloScan</a></p>      </td>  </tr></table><img src=\"http://c5.statcounter.com/counter.php?sc_project=561713&amp;java=0&amp;security=01eeff58\" alt=\"\" border=\"0\" /></body>");