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Mask Operations Filter applies a single mathematical operation to the current mask value at every point. Use it to fine-tune the mask produced by previous filters — for example, inverting it, clamping extreme values, or remapping the range.

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Settings

  • Operation — the mathematical operation to apply:
    • Add — adds a fixed value to every mask pixel. Brightens the mask. Use this to raise the overall spawn probability.
      • Value — the amount to add.
    • Multiply — multiplies every mask pixel by a value. Values below 1 darken the mask; values above 1 brighten it.
      • Value — the multiplier.
    • Power — raises every mask pixel to an exponent. Values greater than 1 push mid-range values darker; values less than 1 push them brighter. Useful for sharpening or softening a gradient.
      • Value — the exponent.
    • Invert — flips the mask so white becomes black and black becomes white. The strength controls how much of the inversion is blended in.
      • Strength Invert — blend amount between original (0) and fully inverted (1). Default is 1.
    • Clamp — restricts all mask values to a defined range. Pixels outside the range are clipped to the nearest bound.
      • Clamp Range — the min and max clamp values. Default is 0–1.
    • Remap — stretches a specific input range to fill the full 0–1 output range. Use this to amplify subtle differences in a narrow part of the mask.
      • Remap Range — the input range to remap. Default is 0.4–0.6.