/ 2026-04-19T00:45:51+00:00 / /lib/tpl/dazdoccenter/images/favicon.ico text/html 2011-12-24T07:58:06+00:00 /public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/bricks/dzfresnelbrick/start <h1 id="fresnel">Fresnel</h1> <div class="level1"> <p> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/brickyard/start" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:brickyard:start">Brickyard</a> : <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/brickyard/functions/start" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:brickyard:functions:start">Functions</a> &gt; <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/brickyard/functions/lighting/start" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:brickyard:functions:lighting:start">Lighting</a> &gt; <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/brickyard/functions/lighting/ray_tracing/start" class="wikilink2" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:brickyard:functions:lighting:ray_tracing:start" rel="nofollow">ray tracing</a> </p> <p> The Fresnel Effect describes objects that are more or less transparent based on the viewing angle. The Fresnel brick uses the Index of Refraction Ratio to calculate this. This procedure also returns the reflection (R) and transmission (T), or refraction, vectors. The refraction vector is computed using <a href="https://en.wikipedia.org/wiki/Snell's law" class="interwiki iw_wp" target="_blank" title="https://en.wikipedia.org/wiki/Snell's law" rel="noopener">Snell&#039;s law</a>. See also, <a href="https://en.wikipedia.org/wiki/ Fresnel equations" class="interwiki iw_wp" target="_blank" title="https://en.wikipedia.org/wiki/ Fresnel equations" rel="noopener"> Fresnel equations</a>. </p> <p> Optionally, an incident direction I and the surface normal N may be supplied. </p> </div> <h2 id="snapshot">Snapshot</h2> <div class="level2"> <p> <a href="/_media/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/bricks/dzfresnelbrick/mathfresnel.png" class="media" target="_blank" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:bricks:dzfresnelbrick:mathfresnel.png" rel="noopener"><img src="/_media/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/bricks/dzfresnelbrick/mathfresnel.png" class="media" alt="" /></a> </p> </div> <h2 id="parameters">Parameters</h2> <div class="level2"> </div> <h3 id="outputs">Outputs</h3> <div class="level3"> <ul> <li class="level1"><div class="li"> <strong>Coefficient of Reflection :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Float</a> - Description…</div> </li> <li class="level1"><div class="li"> <strong>Coefficient of Refraction :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Float</a> - Description…</div> </li> <li class="level1"><div class="li"> <strong>Reflected Vector :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Vector</a> - Description…</div> </li> <li class="level1"><div class="li"> <strong>Refracted Vector :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Vector</a> - Description…</div> </li> </ul> </div> <h3 id="inputs">Inputs</h3> <div class="level3"> <ul> <li class="level1"><div class="li"> <strong>I^{<a href="#fn__1" id="fnt__1" class="fn_top">1)</a>} :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Point</a> - Description…</div> </li> <li class="level1"><div class="li"> <strong>Nf^{<a href="#fn__2" id="fnt__2" class="fn_top">2)</a>} :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Normal</a> - Description…</div> </li> <li class="level1"><div class="li"> <strong>Index of Refraction Ratio :</strong> <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#type" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Float</a> - Description…</div> </li> </ul> </div> <h2 id="examples">Examples</h2> <div class="level2"> <ul> <li class="level1"><div class="li"> In this example, the Coefficient of Reflection is used as the Color, and the Coefficient of Refraction is inverted and used as Opacity.<br/> <a href="/_media/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/bricks/dzfresnelbrick/mathfresneltest.jpg" class="media" target="_blank" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:bricks:dzfresnelbrick:mathfresneltest.jpg" rel="noopener"><img src="/_media/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/bricks/dzfresnelbrick/mathfresneltest.jpg" class="media" alt="" /></a></div> </li> </ul> </div> <div class="footnotes"> <div class="fn">^{<a href="#fnt__1" id="fn__1" class="fn_bot">1)</a>} , ^{<a href="#fnt__2" id="fn__2" class="fn_bot">2)</a>} <div class="content">Available when <strong>Show Advanced</strong> is checked in the <a href="/public/software/dazstudio/4/referenceguide/interface/panes/shader_mixer/shader_workspace/brick_anatomy/start#title_bar" class="wikilink1" title="public:software:dazstudio:4:referenceguide:interface:panes:shader_mixer:shader_workspace:brick_anatomy:start">Brick Option Menu</a>.</div></div> </div>