> For the complete documentation index, see [llms.txt](https://tfg-bravoperezrubio.gitbook.io/cosmicarchitectdocumentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tfg-bravoperezrubio.gitbook.io/cosmicarchitectdocumentation/explanation-of-classes-and-components/ruido.md).

# Noise

The noise system controls the relief generation and visual appearance of the terrain.\
​\
Base Classes:

* **CosmicNoiseClass** (e.g., CosmicDefaultNoiseSettings): Stores the parameters of the noise layers.
* **CosmicNoiseStrategy:** Processes the noise and evaluates the height and color of each point. It allows defining custom logic for the terrain.
* To have your own noise classes, you can create classes that inherit from CosmicNoiseClass and CosmicNoiseStrategy and configure the desired noise layers and parameters. For example, the tool includes a Cosmic Earth Settings type that contains noise layers for continents, mountains, and more to replicate planet Earth.

**CosmicNoiseLayer:** Defines the mathematical properties of an individual noise layer.

* **Noise Type:** Base algorithm (Perlin, Simplex, Cellular, Value, or Ridged).
* **Fractal Type:** Applied fractal pattern (FBM, Ridged, or PingPong).
* **Frequency:** Scale of the noise.
* **Octaves:** Number of overlapping detail layers.
* **Lacunarity:** Controls the heterogeneity and distinctness of the pattern.
* **Persistence:** Defines the loss of amplitude per octave (low values = rockier; high values = smoother).
* **Amplitude:** Intensity and contrast of the generated relief.

**CosmicNoise Biome Parameters:** Parameters that allow varying the terrain based on geographic regions.

* **TemperatureFrequency:** Frequency of the noise defining cold or warm zones.
* **HumidityFrequency/Octaves:** Configuration of the noise defining the terrain humidity.
* **Latitude Effect:** Influence of latitude on temperature (e.g., cold poles vs. warm equator).
* **Altitude Temperature Penalty:** Temperature reduction based on elevation.
* **HumidityContrast/Offset:** Intensity and displacement adjustments for the humidity map.

**Crater Settings:** Specific configuration for impact generation using Cosmic Crater Settings noise.

* **Crater Frequency:** Density of craters on the surface.
* **Crater Depth:** Depth of the impact cavities.
* **Crater Radius Multiplier:** General scale of the crater size.
* **Crater Rim Height:** Height of the crest or outer rim.
* **Crater Rim Sharpness:** Definition of the edge (Smooth vs. Sharp).
* **Crater Floor Height:** Elevation of the inner base of the crater.


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