LightStreakParams

angle: number

Base rotation of the ray fan, in degrees.

density: number

Source sampling grid dimension (instance count = density²). Higher resolves finer highlights, lets streaks be thinner without banding, and costs more vertex work (most instances are culled, so fragment cost stays tied to highlight count).

dispersion: number

Chromatic dispersion, -1..1. Gives each channel a different reach so the streak fringes through colour toward its tip. +1 lets red persist furthest (warm tip, like aperture diffraction); -1 lets blue persist (cool tip, refractive look); 0 is achromatic.

falloff: number

Exponential length fade decay rate. Higher concentrates the brightness into a tighter core near the source and trails a fainter tail; lower flattens toward an even streak.

fringe: number

Diffraction fringe contrast, 0..1. Periodic brightness modulation along the streak whose period scales with wavelength, so bands converge to white at the source and separate into rainbow further out. Distinct from dispersion (a monotone tip-ward shift); 0 disables it.

fringeCount: number

Fringes along the streak (green channel reference); fractional.

highlightClamp: number

Upper clamp on source highlight brightness (Blender's highlight "Maximum"), so blown-out sources don't dominate the accumulation. Floored to just above threshold; lower values have no extra effect.

intensity: number

Streak brightness. Drives a soft-saturating tone map (1 - exp(-acc * intensity)), so raising it brightens without clipping accumulated highlights to white.

length: number

Max streak length in CSS (logical) px.

pad: number | "fullscreen"

Extra pad around the element in CSS px so streaks aren't clipped at the element edge. Should be ≥ length. "fullscreen" reaches the viewport edges.

resolution: number

Accumulation buffer resolution relative to the output, 0..1. Streaks are soft, so 0.5 looks nearly identical and cuts GPU bandwidth to a quarter. 1 accumulates at full resolution.

streaks: number

Number of rays. 2 → a single horizontal axis (anamorphic flare); n → an n-pointed aperture starburst.

threshold: number

Highlight cutoff in [0,1]. Only highlights above this throw streaks.

tint: readonly [number, number, number]

Per-channel multiplier on the streak colour.

width: number

Streak width in CSS (logical) px — the gaussian cross-section of each streak. Thinner than the sampling grid cell and the streak breaks into stripes; raise density for thin-yet-continuous streaks.