# Threejs Bloom

> Implement production bloom in advanced Three.js scenes. Use for HDR signal ordering, bloom-node controls, dual selective bloom with guaranteed material restoration, scene-relative emissive hierarchy, and effect-isolation diagnostics.

- **Type:** Skill
- **Install:** `agentstack add skill-scottstts-threejs-awesome-graphics-agent-skills-threejs-bloom`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [scottstts](https://agentstack.voostack.com/s/scottstts)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [scottstts](https://github.com/scottstts)
- **Source:** https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills/tree/main/skills/threejs-bloom

## Install

```sh
agentstack add skill-scottstts-threejs-awesome-graphics-agent-skills-threejs-bloom
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Bloom

Bloom is a camera/display response to bright HDR signal. Establish scene exposure and emissive luminance before tuning blur.

## Workflow

1. Inspect pre-tone-map luminance.
2. Choose which scene values should bloom.
3. Choose a single-node or dual selective-render ownership model.
4. Calibrate threshold, radius, smooth width, and strength in HDR.
5. Restore all substituted materials transactionally for selective passes.
6. Composite before exposure/tone mapping.
7. Validate base, contribution, and final views.

Read [references/hdr-bloom-system.md](references/hdr-bloom-system.md) for the
HDR ordering, dual selective-bloom transaction, compact emissive hierarchy,
and the costs and limits of each ownership model.

Apply the material substitution/restoration ownership pattern in the
reference before adding selective bloom to a composed scene.

## Failure conditions

- bloom creates the only visible form of an effect;
- all bright materials share one arbitrary emission multiplier;
- threshold is tuned after tone mapping;
- selective bloom requires mutating scene materials every frame without restoration guarantees;
- transparent particles disappear from extraction because pass ownership is unclear;
- bloom radius changes wildly with resolution;
- highlights become gray because energy is clamped too early.

## Routing boundary

Use `$threejs-exposure-color-grading` for metering, adaptation, tone mapping,
and LUTs. Load `$threejs-image-pipeline` only when bloom must be composed with
several shared image-space systems.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [scottstts](https://github.com/scottstts)
- **Source:** [scottstts/Threejs-Awesome-Graphics-Agent-Skills](https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-scottstts-threejs-awesome-graphics-agent-skills-threejs-bloom
- Seller: https://agentstack.voostack.com/s/scottstts
- Browse the marketplace: https://agentstack.voostack.com/browse

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