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< li class = "toctree-l3 current" > < a class = "current reference internal" href = "#" > Perlin noise node< / a > < ul >
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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 < strong > Perlin< / strong > noise node outputs a texture generated as a sum of Perlin noise functions
with increasing frequencies and decreasing amplitudes. Perlin noise has a wide range of
applications, such as stains, wood, dust…< / p >
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< img alt = "_images/node_noise_perlin.png" class = "align-center" src = "_images/node_noise_perlin.png" / >
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< h2 > Inputs< a class = "headerlink" href = "#inputs" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > The < strong > Perlin< / strong > noise node does not accept any input.< / p >
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< h2 > Outputs< a class = "headerlink" href = "#outputs" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > The < strong > Perlin< / strong > noise node provides a greyscale Perlin noise texture.< / p >
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< h2 > Parameters< a class = "headerlink" href = "#parameters" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > The < strong > Perlin< / strong > noise node accepts the following parameters:< / p >
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< ul class = "simple" >
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< li > < p > < em > Scale X< / em > and < em > Scale Y< / em > are the subdivisions of the first iteration< / p > < / li >
< li > < p > < em > Iterations< / em > is the number of iterations< / p > < / li >
< li > < p > < em > Persistance< / em > is the ratio between the amplitude of subsequent iterations. Lower values
of persistance generate smoother textures.< / p > < / li >
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< h2 > Notes< a class = "headerlink" href = "#notes" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > As with all random nodes, the seed is held by the node’
will modify the texture, and the outputs will remain the same if its position and parameters
are not changed.< / p >
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< h2 > Example images< a class = "headerlink" href = "#example-images" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< h2 > Variations< a class = "headerlink" href = "#variations" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< li > < p > The < strong > Color Perlin< / strong > node generates an RGB image made of 3 greyscale Perlin Noise images.< / p > < / li >
< li > < p > The < strong > Perlin Warp1< / strong > and < strong > Perlin Warp2< / strong > nodes generate Perlin noise with domain warping.< / p > < / li >
< / ul >
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