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=\"128512\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=595a578fc37c408b67eb7b15be74c273&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\" />Hey, that's neat <img src=\"http://www.haloscan.com/images/smileys/content.gif\" border=\"0\" alt=\"\" width=\"15\" height=\"15\" />  I've seen this done in an old raytracer where you basically force the renderer to use a different Z value for a given surface; it did require it to always trace all surfaces, instead of stopping on the first hit (presuming opaque), of course.<br><br>Other methods are compositing in post; that way even shadows and reflections can be fooled and the 'impossible' object will be impossible in all three.<br /><span class=\"byline\">           Richard | 07.16.08 - 2:02 pm | <a href=\"#128512\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"128613\"></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\" />What's funny is that I'm more impressed by the top image.  I'm used to trickery in renders, not in viewports.  <img src=\"http://www.haloscan.com/images/smileys/content.gif\" border=\"0\" alt=\"\" width=\"15\" height=\"15\" /><br /><span class=\"byline\">           Chad | 07.17.08 - 8:56 am | <a href=\"#128613\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"128614\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=595a578fc37c408b67eb7b15be74c273&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\" />well as I understand it, given that just camera rays are fooled here, it's actually modeled to be this way.  Essentially you could take a proper cube lattice, give it enough vertices, and then move the 'behind' vertices in front while keeping them at the same X, Y location in the viewing plane.  If rotated, I think you'd see some bendy geometry - but that's just my guess <img src=\"http://www.haloscan.com/images/smileys/content.gif\" border=\"0\" alt=\"\" width=\"15\" height=\"15\" /><br /><span class=\"byline\">           Richard | 07.17.08 - 10:10 am | <a href=\"#128614\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"128618\"></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\" />What?  No depth of field?<br /><span class=\"byline\">           Chad | 07.17.08 - 11:15 am | <a href=\"#128618\" title=\"Link to this comment\">#</a></span></p><hr /></td></tr><tr><td class=\"MessageCell\">    <a name=\"128628\"></a>        <p><img src=\"http://www.gravatar.com/avatar.php?gravatar_id=4777c8df225db4a9ba9672a0706324c7&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\" />My first thought was that I wanted to see it animated <img src=\"http://www.haloscan.com/images/smileys/content.gif\" border=\"0\" alt=\"\" width=\"15\" height=\"15\" /><br /><span class=\"byline\">           cptvideo | 07.17.08 - 2:06 pm | <a href=\"#128628\" 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/cptvideo2/3151346750943141940/\" 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='3151346750943141940' /></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>");