<desc>The controller of objects that are created by the blast. See Blast2Objects in <emlinkhref="material/ocm.html">material definitions</emlink>. If not set, the controller is the owner of the calling object.</desc>
<optional/>
</param>
<param>
<type>int</type>
<name>max_density</name>
<desc>Only materials of the given density or lower are blasted by this explosion. If not specified, any material is blasted.</desc>
<optional/>
</param>
</params>
</syntax>
<desc>Blasts a hole in solid materials. </desc>
<examples>
<example>
<code>BlastFree(300, 300, 40, nil, 70);</code>
<text>Blasts a hole into the landscape with the center of the blast being 300,300. Additionally, only materials of a density of 70 or lower are blasted, so this blast does not blast granite.</text>