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Glow

Glow · screenshot coming soon

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What this node does

Glow isolates the bright parts of each frame (above a threshold), blurs them across several radii, and adds that soft light back over the picture. The result is a filmic bloom around highlights — neon signs, sun glints, bright skin, glowing screens. This is a rendered stage — it needs a ▶ Run. It uses a torch (GPU) backend. In goes COMFYTV_VIDEO, out comes COMFYTV_VIDEO. To hand the result to a native ComfyUI node, insert a Bridge. See bridges.md.

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When to use it

  • Add a dreamy, ethereal bloom to bright highlights.
  • Make neon, lights, or emissive surfaces glow.
  • Soften a harsh, digital-looking render.

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Parameters

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threshold

0.0–0.99, default 0.7. Brightness cutoff — only pixels brighter than this contribute to the glow. Lower it to make more of the frame glow; raise it to restrict glow to the brightest highlights.

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size

0.5–50.0 (step 0.5), default 4.0. Base blur radius for the glow. Larger = wider, softer halo.

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bloom_ratio

1.1–4.0, default 2.0. How much each successive blur layer grows relative to the previous one. Higher values spread the bloom over a wider range of sizes.

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bloom_count

1–8, default 5. Number of blur layers combined to build the glow. More layers = smoother, more graduated falloff.

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gain

0.0–8.0, default 1.0. Brightness of the added glow. Push above 1.0 for a stronger, blown-out bloom.

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mix

0.0–1.0, default 1.0. Blend of the glowed result over the original. 1.0 is full effect; lower it to dial the glow back.

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Outputs

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Tips

  • If the whole frame glows, raise threshold; if only tiny specks glow, lower it.
  • size and bloom_ratio together control the shape of the halo — size sets the base, bloom_ratio/bloom_count set how far it spreads.
  • God Rays — volumetric light shafts radiating from a source.
  • Video Stylize — simpler one-click looks.