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Height Noise Filter works like the Height Filter, but adds fractal noise to the edges of the height range. Instead of a smooth gradient, the boundary between spawning and no-spawning becomes irregular and organic — particularly useful for effects like realistic snow accumulation where the snow line isn’t perfectly even. Height Noise Filter used to create a natural snow line.

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Settings

  • Blend Mode — how this filter combines with the previous mask in the stack. Multiply narrows the spawn area; Add expands it.
  • Min Height / Max Height — the height range (in world units) within which spawning is allowed.
  • Height Falloff Type — controls how the edges blend to zero:
    • Add — adds a fixed distance on each side of the range.
    • Hard — sharp cutoff with no falloff.
  • Height Falloff Min Max — when enabled, set separate falloff distances for the lower and upper edges. When disabled, a single value applies to both.
  • Min Add Height Falloff — falloff distance below Min Height (when Height Falloff Min Max is on). Default is 30.
  • Max Add Height Falloff — falloff distance above Max Height (when Height Falloff Min Max is on). Default is 30.
  • Add Height Falloff — unified falloff for both edges (when Height Falloff Min Max is off). Default is 30.
  • Min Range Noise — noise amplitude applied at the lower boundary (Min Height). Larger values make the lower edge more irregular.
  • Max Range Noise — noise amplitude applied at the upper boundary (Max Height). Larger values make the upper edge more irregular.
  • Noise Settings — configures the fractal noise used for edge irregularity (type, frequency, octaves, etc.).
This filter is ideal for snow texturing — set a height range and increase Max Range Noise to make the snow line look natural and windswept.