Noise Modifiers

Noise modifiers are mathematical functions applied to the raw noise output to warp and shape the terrain. They can be nested to create complex effects.

• Add / Subtract / Multiply / Divide: Basic arithmetic to shift or scale the heightmap.
• Abs: Converts all negative noise values to positive, creating 'valley' floors.
• Clamp: Forces all values into a specific range (e.g., preventing terrain from going above Y=200).
• Exponent: Raises the noise to a power, making peaks sharper and valleys flatter.
• Select: Uses a control noise to choose between two different noise sources (e.g., using Worley noise to decide where Perlin mountains should spawn).
• Terrace: Quantizes the noise values into discrete steps, creating 'plateau' or 'canyon' effects.