Particle Fill

Controls how particles are filled with an inner color. This document mirrors the IFill/Fill options used by the engine.

Properties

• enable (boolean) — Default: true
  • When true, the particle interior is filled. When false, only stroke (outline) is used.
• color (IAnimatableColor | IRangeColor)
  • Fill color. Can be an IAnimatableColor (allows color animation) or an IRangeColor for randomized ranges.
• opacity (number | RangeValue) — Default: 1
  • Fill opacity (0..1). Accepts static values or range objects used by engine utilities.

Default behavior

• enable defaults to true in Fill class constructor.
• opacity defaults to 1.
• If paint.fill is omitted, the engine historically uses filled particles (white) unless overridden by paint.stroke or palettes.

Notes

• paint groups both fill and stroke options; palettes may supply default fill values when particles.palette is used.
• Use IAnimatableColor when you want color animations (see AnimatableColor options documentation).

Example

{
  "particles": {
    "paint": {
      "fill": {
        "enable": true,
        "color": { "value": "#ff0000" },
        "opacity": 0.9
      }
    }
  }
}
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