https://wiki.povray.org/content?action=history&feed=atom&title=Reference%3AMergeReference:Merge - Revision history2026-04-06T16:31:06ZRevision history for this page on the wikiMediaWiki 1.35.1https://wiki.povray.org/content?title=Reference:Merge&diff=6934&oldid=prevJholsenback: 1 revision: Reference Migration Initial Load2012-03-15T19:07:29Z<p>1 revision: Reference Migration Initial Load</p>
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<p><b>New page</b></p><div>[[Category:Objects]]<br />
[[Category:Constructive Solid Geometry]]<br />
{{#indexentry:CSG, merge}}<br />
{{#indexentry:merge, keyword}}<br />
{{#indexentry:keyword, merge}}<br />
<p>The <code>union</code> operation just glues objects together, it does not<br />
remove the objects' surfaces inside the <code>union</code>. Under most<br />
circumstances this does not matter. However if a transparent <code><br />
union</code> is used, those interior surfaces will be visible. The <code><br />
merge</code> operations can be used to avoid this problem. It works just like<br />
<code>union</code> but it eliminates the inner surfaces like shown in the<br />
figure below.</p><br />
<br />
<table class="centered" width="660x" cellpadding="0" cellspacing="10"><br />
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<td><br />
[[Image:RefImgMergeobj.gif|center|640px<!--center--->]]<br />
</td><br />
</tr><br />
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<td><br />
<p class="caption">Merge removes inner surfaces.</p><br />
</td><br />
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<br />
<p>The syntax is:</p><br />
<pre><br />
MERGE:<br />
merge {<br />
SOLID_OBJECTS...<br />
[OBJECT_MODIFIERS...]<br />
}<br />
</pre><br />
<br />
<p>The component objects must have well defined inside/outside properties.<br />
Patch objects are not allowed. </p><br />
<p class="Note"><strong>Note:</strong> In general <code>merge</code> is slower rendering than <code>union</code> when used with non transparent objects. A small test may be needed to determine what is the optimal solution regarding speed and visual result.</p></div>Jholsenback