reference-look-calibration

reference-look-calibration is a skill for Claude Code from CheshireJCat/blender. It costs 83 tokens per session (459 once invoked), scanned A, a copy of reference-look-calibration, MIT.

A Blender workflow for matching a rendered object's materials, lighting, camera framing, glow, colors, and surrounding effects to a supplied reference image. It compares the render and reference using measurable image properties such as brightness, color, and shape coverage.

In plain words
What is it for?
Use it after the model's shape and textures are accepted, when a Blender render needs to match the look of an original image. It covers the subject, background, emission, aura, and HUD styling.
Why use it?
It helps identify whether a render looks different because of framing, lighting, color, or glow instead of relying only on visual guesswork.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it after the model's shape and textures are accepted, when a Blender render needs to match the look of an original image. It covers the subject, background, emission, aura, and HUD styling.

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Install with agentmods
npx agentmods add skills/cheshirejcat/blender/reference-look-calibration
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add CheshireJCat/blender --skill reference-look-calibration
Clone the repo
git clone --depth 1 https://github.com/CheshireJCat/blender

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for reference-look-calibration

README.md
[![agentmods](https://agentmods.dev/badge/skills/cheshirejcat/blender/reference-look-calibration/github.svg)](https://agentmods.dev/skills/cheshirejcat/blender/reference-look-calibration)
Your own site
<a href="https://agentmods.dev/skills/cheshirejcat/blender/reference-look-calibration"><img src="https://agentmods.dev/badge/skills/cheshirejcat/blender/reference-look-calibration/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for reference-look-calibration

Your own site · 80×15
<a href="https://agentmods.dev/skills/cheshirejcat/blender/reference-look-calibration"><img src="https://agentmods.dev/badge/skills/cheshirejcat/blender/reference-look-calibration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 459 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 95% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00083 $0.00459
Opus 5 $0.00042 $0.00230
Sonnet 5 $0.00017 $0.00092
Haiku 4.5 $0.00008 $0.00046

Measured 10d ago against content hash 2b8313c039eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

reference-look-calibration scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/look_fit_report.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

95% identical to reference-look-calibration — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/create-3d-model/references/modules/reference-look-calibration/SKILL.md · 50 lines

What it actually says

Reference Look Calibration

This skill handles the final visual match after geometry and UVs are locked. It must not compensate for wrong shape, wrong UVs, or wrong camera framing.

Inputs

  • accepted geometry / UV fit reports;
  • reference/original image(s);
  • product preview render(s);
  • optional mask overlays and multiview fit reports.

Metrics

Use scripts/look_fit_report.py to compare:

  • object/bright-mask IoU and bbox extent;
  • configured hue-band mask IoU for glow/accent assets;
  • mean/std HSV and BGR under object mask;
  • brightness p95 / mean;
  • saturation mean;
  • hue drift.

Calibration order

  1. Camera crop / orthographic scale — object extent must match before color tuning.
  2. World/background darkness.
  3. Base material hue/value/saturation.
  4. Emission strength and glow color.
  5. Aura/HUD ring color and thickness.
  6. Color management / exposure / gamma.
  7. Final render overlay and metrics.

Hard rules

  • Do not tune lighting before geometry/UV fit gates pass.
  • Do not change accent/glow hue away from the source reference unless the user explicitly asks.
  • Do not hide mismatched geometry with bloom, fog, or overexposure.
  • Write look metrics before and after calibration.

Handoff

Consumes validation/multiview_fit_report*.json and product previews. Produces validation/look_fit_report.json, look overlays, and updated material/light/render settings.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 50 lines · 83 tokens per session scan A 2b8313c039eb

Subscribe to this mod's changes

reference-look-calibration is a skill published in the GitHub repository CheshireJCat/blender (26 stars, last pushed 20d ago), licensed MIT. It adds 83 tokens to every session and 459 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to reference-look-calibration, differing in 2 lines, and is treated as a copy.

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