> ## Documentation Index
> Fetch the complete documentation index at: https://comfytv.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Glow

> Bloom / glow that makes bright areas bleed light — like a lens bloom or After Effects "Glow", with a multi-blur soft falloff.

<Frame caption="Glow · screenshot coming soon">
  <img src="https://mintcdn.com/comfytv/dMkMxJDZdIo4YzAU/images/nodes/_placeholder.svg?fit=max&auto=format&n=dMkMxJDZdIo4YzAU&q=85&s=b54171099e5b02d4313fe581171ebbcc" alt="Glow" width="800" height="450" data-path="images/nodes/_placeholder.svg" />
</Frame>

## 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](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).

## 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.

## Parameters

### 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.

### size

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

### 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.

### bloom\_count

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

### gain

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

### 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.

## Outputs

| Output    | Type            | Meaning                   |
| --------- | --------------- | ------------------------- |
| **video** | `COMFYTV_VIDEO` | The clip with bloom added |

## 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.

## Related nodes

* **God Rays** — volumetric light shafts radiating from a source.
* **Video Stylize** — simpler one-click looks.