3d-sky-rays

Add sun shafts and crepuscular rays to a Three.js or equivalent 3D scene, using scene occlusion, a projected sun position, controlled foreground spill, and scalable post-processing. Use for rays of light from the sky, sunlight through trees or roofs, and golden-hour architectural scenes.

Quality

90%

Does it follow best practices?

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Securityby

Passed

No findings from the security scan

Quality

Content

81%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A dense, well-structured technical recipe with clear sequencing, a verification checklist, and justified pseudocode. Its main gaps are a non-executable core example and a referenced REFERENCES.md that is missing from the bundle.

Suggestions

Provide a copy-paste-ready shader/code snippet (e.g. a complete GLSL fragment) in addition to the pseudocode, or in a referenced file, to lift actionability to 5.

Add the missing REFERENCES.md file referenced at the end of the body, or remove/repoint the link, so progressive-disclosure navigation is intact.

Tighten the dense prose in 'Tune appearance before cost' and the occlusion-pass notes to trim a few sentences that assume little, improving conciseness.

Dimension	Reasoning	Score
Conciseness	Mostly lean and assumes competence (e.g. 'uv = ndc.xy * 0.5 + 0.5', 'This is an artistic approximation, not a substitute for depth-integrated volumetric scattering'), with a few dense prose passages that could be tightened; not a 5 because some explanatory sentences are slightly more than minimum.	4 / 5
Actionability	Provides concrete formulas, a justified backend-agnostic pseudocode accumulation core, and specific tuning values (24–48 samples, half-res buffer), but the core example is pseudocode rather than copy-paste executable code, so it stops just short of 5.	4 / 5
Workflow Clarity	The ray pass is laid out as a clear 1–6 sequence, followed by an explicit Verify checklist and debugging guidance ('Whiteout usually means excessive intensity or a bad mask'), providing explicit validation steps and an error-recovery signal.	5 / 5
Progressive Disclosure	Well-organized sections with a single clearly-signaled one-level-deep reference ('Read REFERENCES.md for the source and renderer documentation'); not a 5 because the referenced REFERENCES.md file is not present in the bundle, so navigation is partly broken.	4 / 5
	Total	17 / 20 Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is exemplary: third-person, concrete, comprehensive in both capability and trigger coverage, with a distinctive niche. It cleanly answers what and when without padding.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions and mechanisms — 'Add sun shafts and crepuscular rays', 'scene occlusion', 'projected sun position', 'controlled foreground spill', 'scalable post-processing' — giving comprehensive coverage of what the skill does.	5 / 5
Completeness	Explicitly answers both what ('Add sun shafts and crepuscular rays to a Three.js... scene, using...') and when ('Use for rays of light from the sky, sunlight through trees or roofs, and golden-hour architectural scenes').	5 / 5
Trigger Term Quality	Natural user phrases are well covered with synonyms — 'sun shafts', 'crepuscular rays', 'rays of light from the sky', 'sunlight through trees or roofs', 'golden-hour architectural scenes' — terms a user would actually say.	5 / 5
Distinctiveness Conflict Risk	A clear niche (3D sky-ray volumetric post-processing) with distinct triggers and named renderer context, giving minimal overlap risk with other skills.	5 / 5
	Total	20 / 20 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
relative_links	Relative link issues: 1 missing	Warning

	Total	15 / 16 Passed

Repository: MengTo/Skills
Path: agent-skills/3d/3d-sky-rays/SKILL.md
Commit: 798db0a

Reviewed: 5 days ago

Table of Contents

Discovery Implementation Validation

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