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<p>With <code>photons</code> it is possible to render true reflective and refractive caustics. Th <p>Photon mapping works by shooting packets of light (photons) from light

:::1.3.7.7 [[Documentation:Tutorial Section 3.7#Media and photons|Media and photons]] ...9.4 [[Documentation:Tutorial Section 3.8#Do Not Use Jitter Or Crand|Do Not Use Jitter Or Crand]]

<p>One solution for this is to use both types of medias inside the same object. ====Media and photons====

* Global Illumination: Radiosity (Indirect Lighting) ; Photons caustics (reflect/refract); meshlights ...{{Submenu|<u>P</u>references}} to the location of the engine you choose to use and you're good to go.

light. Earlier versions of POV-Ray required you to use the <code> specified in the pigment statement or to use the <code>[[Reference:Interior|:fade_power, interior|fade_power]]</code>

*[[HowTo:Use radiosity | How to: Simulate real-world ambient light]] *[[HowTo:Use photons | How to: Simulate real-world optical effects]]

which explains step by step how to use the different features of POV-Ray.</li> <li>Easy to use scene description language.</li>

If you want those surfaces to be removed you will have to use the <code> ...ect">photons</linkto>--->[[Reference:Photons#Shooting Photons at an Object|photons]] are shot

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...ctions which follows, we explain how to place and orient the camera by the use of these four vectors and the <code>sky</code> and <code>look_at</code> mod is possible to use the <code>direction</code> vector to determine the viewing

...part of a <code>texture</code> specification. However it can be tedious to use a <code>texture</code> statement just to add a highlights or other lighting ...}} in version 3.8 expands <code>fresnel</code> angle-dependent attenuation use to now include the <code>ambient</code>, <code>diffuse</code>, <code>emissi

<p>The same 40 blocks with <code>+RS8</code> would in fact use <code>+RS7</code> instead. As would a <code>+RS2</code> in fact be reduced Settings below 8 do not use reflection or refraction. The duplicate values

::* [[Documentation:Tutorial Section 3.7#Media and photons|Media and photons]] ::* [[Documentation:Tutorial Section 3.8#Do Not Use Jitter Or Crand|Do Not Use Jitter Or Crand]]

<p>A possible use could be switching off radiosity or photons from command-line:</p> scene file. You can for example use this option to always include a specific