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Heightfield Noise

fields/heightfield-noise·v1.5.1

IN:1 OUT:1

SUMMARY

Heightfield Noise evaluates noise at every sample's position in the plane and combines it with a layer of the height field. Amplitude and Element Size are in world units, so the features keep their size at any resolution, and Combine with Existing sets how the noise combines with the current value.

It offers 14 noise types, including Perlin, Simplex, Worley and Alligator, with Standard, Terrain and Hybrid Terrain fractals, plus Fold, Complement, Gain, Bias and Clip to shape the result. Write to Height to build terrain, or to any other layer to create a noise falloff; the falloff blends the effect, and 0 keeps the input exactly.

PARAMETERS

PAGENoise

Layer	Layer	The layer the noise is written to. Height moves the terrain; any other name writes a float layer (a falloff, for example).
[+]Combine with Existing	Combineop	How the noise combines with the layer's current value.
Blend	Blend	The mix between the current value (0) and the noise (1) when Combine with Existing is Blend.
Amplitude	Amplitude	The height of the noise in world units.
Element Size	Elementsize	The size of one noise feature in world units. It does not depend on the resolution.
[+]Scale	Scale	Stretches the noise along the height field's two axes.
[+]Offset	Offset	Moves the noise in world units. Offset Z moves through the noise (animate it to evolve the terrain).
Seed	Seed	Numerical value that initializes the randomization.
Do Falloff	Dofalloff	Weight the effect on each point by the Falloff Attribute.
Falloff Attribute	Falloffattr	The point attribute, 0 to 1, that weights the effect.
Invert Falloff	Invertfalloff	Uses one minus the falloff attribute.
Falloff Strength	Falloffstrength	Scales the effect of the falloff attribute.
[+]Border	Border	Determines how samples outside the height field are read at its edges. Streak repeats the edge value, Constant uses Border Value, Repeat wraps around.
Border Value	Bordervalue	The height read outside the height field when Border is Constant.

PAGENoise Type

[+]Noise Type	Noisetype	Selects the noise function.
[+]Fractal	Fractal	Adds octaves of finer noise. Terrain damps the detail in valleys, Hybrid Terrain makes sharper valleys.
Max Octaves	Maxoctaves	The number of noise layers added by the fractal.
Lacunarity	Lacunarity	The frequency multiplier from one octave to the next.
Roughness	Roughness	The amplitude multiplier from one octave to the next. Small steps change it a lot.
[+]Period	Period	The number of features after which a periodic noise repeats.
Flow Rotation	Flowrotation	Rotates the flow noise, where 1 is a full turn. Animate it for a swirling motion.
Fold	Fold	Takes the absolute value of the noise: sharp creases where it crosses zero.
Complement	Complement	Uses one minus the noise.
Enable Gain	Enablegain	Applies a gain curve to the noise.
Gain	Gain	Below 0.5 flattens the noise toward its middle, above 0.5 pushes it toward its extremes.
Enable Bias	Enablebias	Applies a bias curve to the noise.
Bias	Bias	Below 0.5 favors low values, above 0.5 favors high values.
Clip Minimum	Clipmin	Clamps the noise from below (after the Amplitude).
Minimum	Clipminimum	The lowest noise value in world units.
Clip Maximum	Clipmax	Clamps the noise from above (after the Amplitude).
Maximum	Clipmaximum	The highest noise value in world units.

PAGECommon

Bypass	Bypass	Pass through the first input to the output unchanged.
Free Extra GPU Memory	Freeextragpumem	Free memory that has accumulated when output memory has grown and shrunk.

INPUTS

Input 0 POP - Heightfield

OUTPUTS

Output 0 POP - Heightfield