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<li class="toctree-l3 current"><a class="current reference internal" href="#">Perlin noise node</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="#inputs">Inputs</a></li>
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<div class="section" id="perlin-noise-node">
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<h1>Perlin noise node<a class="headerlink" href="#perlin-noise-node" title="Permalink to this headline">¶</a></h1>
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<p>The Perlin noise node outputs a texture generated as a sum of Perlin noise functions
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with increasing frequencies and decreasing amplitudes.</p>
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<img alt="_images/node_perlin.png" src="_images/node_perlin.png" />
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<div class="section" id="inputs">
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<h2>Inputs<a class="headerlink" href="#inputs" title="Permalink to this headline">¶</a></h2>
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<p>The Perlin noise node does not accept any input.</p>
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</div>
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<div class="section" id="outputs">
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<h2>Outputs<a class="headerlink" href="#outputs" title="Permalink to this headline">¶</a></h2>
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<p>The Perlin noise node provides a greyscale Perlin noise texture.</p>
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<img alt="_images/perlin.png" src="_images/perlin.png" />
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</div>
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<div class="section" id="parameters">
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<h2>Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline">¶</a></h2>
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<p>The Perlin noise node accepts the following parameters:</p>
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<ul class="simple">
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<li><em>Scale X</em> and <em>Scale Y</em> are the subdivisions of the first iteration</li>
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<li><em>Iterations</em> is the number of iterations</li>
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<li><em>Persistance</em> is the ratio between the amplitude of subsequent iterations. Lower values
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of persistance generate smoother textures.</li>
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</ul>
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</div>
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<div class="section" id="notes">
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<h2>Notes<a class="headerlink" href="#notes" title="Permalink to this headline">¶</a></h2>
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<p>As with all random nodes, the seed is held by the node’s position, so moving the node in the graph
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will modify the texture, and the outputs will remain the same if its position and parameters
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are not changed.</p>
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