<!-- This file copyright Persistence of Vision Raytracer Pty. Ltd. 2003-2004 -->
<html>
<head>
<!-- NOTE: In order to users to help find information about POV-Ray using -->
<!-- web search engines, we ask you to *not* let them index documentation -->
<!-- mirrors because effectively, when searching, users will get hundreds -->
<!-- of results containing the same information! For this reason, the two -->
<!-- meta tags below disable archiving and indexing of this page by all -->
<!-- search engines that support these meta tags. -->
<meta content="noarchive" name="robots">
<meta content="noindex" name="robots">
<meta content="no-cache" http-equiv="Pragma">
<meta content="0" http-equiv="expires">
<title>3.8.12 Atmospheric Effects</title>
<link href="povray35.css" rel="stylesheet" type="text/css">
</head>
<body>
<table class="NavBar" width="100%">
<tr>
<td align="left" nowrap="" valign="middle" width="32">
<a href="s_163.html"><img alt="previous" border="0" src="prev.png"></a>
</td>
<td align="left" valign="middle" width="30%">
<a href="s_163.html">3.8.11 Media</a>
</td>
<td align="center" valign="middle">
<strong class="NavBar">POV-Ray 3.6 for UNIX documentation</strong><br> <strong>3.8.12
Atmospheric Effects</strong>
</td>
<td align="right" valign="middle" width="30%">
<a href="s_165.html">3.8.13 Global Settings</a>
</td>
<td align="right" nowrap="" valign="middle" width="32">
<a href="s_165.html"><img alt="next" border="0" src="next.png"></a>
</td>
</tr>
</table>
<h3><a name="s03_08_12">3.8.12 </a>Atmospheric Effects</h3>
<a name="s03_08_12_i1"><a name="quickref, atmospheric effects"></a><a name="s03_08_12_i2">
<dl class="Syntax">
<dt class="SubDesc">
Describe various background and atmospheric features
<dt>
ATMOSPHERIC_EFFECT:
<dd>
<code>MEDIA | BACKGROUND | FOG | SKY_SPHERE | RAINBOW</code>
</dl>
<p>
<a href="s_153.html#s03_08_01">Quick Reference Contents</a>
</p>
<h4><a name="s03_08_12_01">3.8.12.1 </a>Background</h4>
<a name="s03_08_12_01_i1"><a name="quickref, background"></a><a name="s03_08_12_01_i2">
<dl class="Syntax">
<dt class="SubDesc">
Specify a background color for the scene:
<dt>
BACKGROUND:
<dd>
<code><strong>background {</strong> COLOR <strong>}</strong></code>
</dl>
<p>
<a href="s_153.html#s03_08_01">Quick Reference Contents</a>
</p>
<h4><a name="s03_08_12_02">3.8.12.2 </a>Fog</h4>
<a name="s03_08_12_02_i1"><a name="quickref, fog"></a><a name="s03_08_12_02_i2">
<dl class="Syntax">
<dt class="SubDesc">
Simulate a hazy or foggy atmosphere:
<dt>
FOG:
<dd class="Jump">
<a href="s_101.html#s03_03_02_03">Jump to SDL</a>
<dd>
<code>CONSTANT_FOG | GROUND_FOG</code>
<dt>
CONSTANT_FOG:
<dd>
<code><strong>fog {</strong> [FOG_IDENTIFIER] [<strong>fog_type 1</strong>] FOG_ITEMS <strong>}</strong></code>
<dt>
FOG_ITEMS:
<dd>
<code><strong>distance</strong> FLOAT & COLOR & <a href="s_162.html#s03_08_10_08">[TURBULENCE</a> [<strong>turb_depth</strong> FLOAT]]</code>
<dt>
GROUND_FOG:
<dd>
<code><strong>fog {</strong> [FOG_IDENTIFIER] <strong>fog_type 2</strong> GROUND_FOG_ITEMS <strong>}</strong></code>
<dt>
GROUND_FOG_ITEMS:
<dd>
<code>FOG_ITEMS & <strong>fog_offset</strong> FLOAT & <strong>fog_alt</strong> FLOAT & [<strong>up</strong> VECTOR [TRANSFORMATION...]]</code>
</dl>
<p>
<a href="s_153.html#s03_08_01">Quick Reference Contents</a>
</p>
<h4><a name="s03_08_12_03">3.8.12.3 </a>Sky Sphere</h4>
<a name="s03_08_12_03_i1"><a name="quickref, sky sphere"></a><a name="s03_08_12_03_i2">
<dl class="Syntax">
<dt class="SubDesc">
Specify a sky pigment:
<dt>
SKY_SPHERE:
<dd>
<code><strong>sky_sphere {</strong> [SKY_SPHERE_IDENTIFIER] [SKY_SPHERE_ITEM...] <strong>}</strong></code>
<dt>
SKY_SPHERE_ITEM:
<dd>
<code>PIGMENT | TRANSFORMATION</code>
</dl>
<p>
<a href="s_153.html#s03_08_01">Quick Reference Contents</a>
</p>
<h4><a name="s03_08_12_04">3.8.12.4 </a>Rainbow</h4>
<a name="s03_08_12_04_i1"><a name="quickref, rainbow"></a><a name="s03_08_12_04_i2">
<dl class="Syntax">
<dt class="SubDesc">
Specify a rainbow arc:
<dt>
RAINBOW:
<dd class="Jump">
<a href="s_101.html#s03_03_02_05">Jump to SDL</a>
<dd>
<code><strong>rainbow {</strong> [RAINBOW_IDENTIFIER] [RAINBOW_ITEMS] <strong>}</strong></code>
<dt>
RAINBOW_ITEMS:
<dd>
<code><strong>direction</strong> VECTOR & <strong>angle</strong> FLOAT & <strong>width</strong> FLOAT
& <strong>distance</strong> FLOAT & <a href="s_162.html#s03_08_10_04">COLOR_MAP</a> & [<strong>jitter</strong> FLOAT]
& [<strong>up</strong> VECTOR] & [<strong>arc_angle</strong> FLOAT] & [<strong>falloff_angle</strong> FLOAT]</code>
</dl>
<p>
<a href="s_153.html#s03_08_01">Quick Reference Contents</a>
</p>
<br>
<table class="NavBar" width="100%">
<tr>
<td align="left" nowrap="" valign="middle" width="32">
<a href="s_163.html"><img alt="previous" border="0" src="prev.png"></a>
</td>
<td align="left" valign="middle" width="30%">
<a href="s_163.html">3.8.11 Media</a>
</td>
<td align="center" valign="middle">
<strong>3.8.12 Atmospheric Effects</strong>
</td>
<td align="right" valign="middle" width="30%">
<a href="s_165.html">3.8.13 Global Settings</a>
</td>
<td align="right" nowrap="" valign="middle" width="32">
<a href="s_165.html"><img alt="next" border="0" src="next.png"></a>
</td>
</tr>
</table>
</body> </html>
