Threejs Raymarched Space Effects Agent Skill
Build raymarched space phenomena in Three.js. Use for black-hole lensing, accretion disks, wormholes, curved-ray integration, procedural star fields, relativistic-looking distortion, bounded volumetric structures, and GPU effects that need controlled numerical integration.
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills --skill threejs-raymarched-space-effectsThe instruction itself
4 sections, as written by the authorRaymarched Space Effects
Treat these effects as numerical renderers with explicit integration state. The visual character depends on coordinate choice, step policy, and how rays interact with emissive structures.
Workflow
- Define the effect-space transform and camera ray.
- Choose a physical, physically inspired, or purely artistic bending model.
- Bound the integration domain.
- Track ray position, direction, throughput, and accumulated radiance.
- Detect crossings with disks, shells, throats, or event boundaries.
- Sample the background only after integration terminates.
- Add diagnostics for trajectory, step count, and termination reason.
Read references/curved-ray-integrators.md
for the RK4 wormhole, artistic curved-ray accretion integrator, disk
composition, and implementation defects.
Read the
curved-ray accretion volume
for the inverse-square steering loop, thin disk density, front-to-back
accumulation, deterministic star environment, and integrator diagnostics.
Read the
Schwarzschild geodesic black-hole effect
for RK2 null-geodesic integration, interpolated equatorial disk crossings,
Doppler/redshift disk emission, lensed procedural deep field, and HDR bloom
composition.
Constraints
- Do not call a UV swirl “gravitational lensing.”
- Cap iterations and provide early termination.
- Use continuous crossing tests for thin structures.
- Keep numerical stability independent from frame rate.
- Separate the integrator from shading of the accretion disk or wormhole interior.
- Provide a cheaper approximation for non-hero views.
Routing boundary
Use $threejs-procedural-vfx for ordinary particles, trails, plasma, and event
effects. This skill is for per-pixel numerical ray integration through curved
or bounded space-effect domains.
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How to use it
Take scottstts/threejs-raymarched-space-effects from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.