Bloom spreads light from the bright parts of the layer the way a real light falls off, with a hot core and a long haze. Light adds up, so its default blend is Add.
Parameters
| Name | What it does | Default / range |
|---|---|---|
| Threshold | Only light brighter than this glows. 0 = everything, 100 = only the brightest. | 60%, 0–100% |
| Threshold Softness | Feathers around the threshold so the glow ramps in smoothly. | 25%, 0–100% |
| Glow Radius | How far the glow's tail reaches, px. | 80, 0–1000 |
| Glow Intensity | Higher burns the core white and throws the haze further. | 4, 0–20 |
| Falloff | How fast the glow fades with distance. 2 is inverse square, like a real light; lower spreads a haze, higher stays tight. | 2, 1–3 |
| Glow Color | Tints the glow. | White |
| Blend | Add, Screen, Normal, Multiply, or Glow Only. | Add |
Tips
- The Outer Glow and Inner Glow layer styles have a Bloom technique that uses this falloff. See Layer Styles.