Value Noise
Menu Path : Operator > Noise > Value Noise
The Value Noise Operator allows you to specify coordinates to sample a noise value within a specified range in one, two, or three dimensions. Value noise uses simple interpolated values, which means that adjacent values are likely to be similar.
You can use this Operator to introduce variety to your particle attributes. A common use case is to sample using each particle’s position as a coordinate to output a new color, velocity, or position value.
Operator settings
Property | Type | Description |
---|---|---|
Dimensions | Enum | Specify whether the noise is one, two, or three dimensional. |
Type | Enum | Specify what type of noise to use. |
Operator properties
Input | Type | Description |
---|---|---|
Coordinate | Float Vector2 Vector3 |
The coordinate in the noise field to sample from.![]() The Type changes to match the number of Dimensions. |
Frequency | Float | The period in which Unity samples the noise. A higher frequency results in more frequent noise change.![]() |
Octaves | Int | The number of layers of noise. More octaves create a more varied look but are also more resource-intensive to calculate.![]() |
Roughness | Float | The scaling factor Unity applies to each octave. Unity only uses roughness when Octaves is set to a value higher than 1.![]() |
Lacunarity | Float | The rate of change of the frequency for each successive octave. A lacunarity value of 1 results in each octave having the same frequency.![]() |
Range | Vector2 | The range within which Unity calculates the noise. The noise stays between the X and Y value you specify here, where X is the minimum and Y is the maximum.![]() |
Output | Type | Description |
---|---|---|
Noise | Float | The noise value at the coordinate you specify. |
Derivatives | Float Vector2 Vector3 |
The rate of change of the noise for every dimension. The Type changes to match the number of Dimensions. |