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54 lines
1.3 KiB
ReStructuredText
54 lines
1.3 KiB
ReStructuredText
Perlin noise node
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~~~~~~~~~~~~~~~~~
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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. Perlin noise has a wide range of
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applications, such as stains, wood, dust...
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.. image:: images/node_perlin.png
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Inputs
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++++++
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The **Perlin** noise node does not accept any input.
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Outputs
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+++++++
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The **Perlin** noise node provides a greyscale Perlin noise texture.
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Parameters
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++++++++++
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The **Perlin** noise node accepts the following parameters:
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* *Scale X* and *Scale Y* are the subdivisions of the first iteration
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* *Iterations* is the number of iterations
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* *Persistance* is the ratio between the amplitude of subsequent iterations. Lower values
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of persistance generate smoother textures.
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Notes
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+++++
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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.
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Example images
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++++++++++++++
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.. image:: images/node_perlin_samples.png
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:align: center
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Variations
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++++++++++
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* The **Color Perlin** node generates an RGB image made of 3 greyscale Perlin Noise images.
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* The **Perlin Warp1** and **Perlin Warp2** nodes generate Perlin noise with domain warping.
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.. image:: images/node_perlin_variations.png
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:align: center
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