A SCENE, NOT A SCREENSHOT / SYNAGEN

Start from light
that already moves.

Every template is a live scene: real entities, real materials, a real shader path. Open one, select a volume, and the light answers.

See Water Caustics Browse the library

01 / FEATURED TEMPLATE

Water Caustics

Analytic water photon transport in native WebGPU Preview — the light in the pool is computed, not textured.

What it does

Analytic wave height and slope, then photon triangles refracted with Snell's law
Additive rasterization into an fp16 HDR slice array, read back as receiver light and underwater shafts
A Water Volume you can edit: enabled, pause waves, wave amplitude, intensity, shaft strength
Scene storage, undo history and the agent API all address the same component

WebGPU PreviewSnell refractionfp16 slice transportShafts

Measured, not asserted

0.052% flat normal-incidence energy against an independent Snell / Fresnel / Beer oracle
0.067% four flat sun directions against a pixel-centre raster oracle
0 energy at zero amplitude, disabled volume, and intensity zero

Diagnostic energy values are not calibrated radiometric units.

Where it stops

Single air→water refraction with approximate Fresnel transmission and finite receiver slices. Opaque depth bounds the viewed shaft. No FFT ocean, dynamic photon occlusion, spectral dispersion, or material-aware transport.

Read the authored water defaults

02 / THE LIBRARY

Open, edit, keep building

Scene Templates → the template in the editor. Each one is a starting scene with its own entity set and inspector.

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Source, honestly attributed

The caustics prototype came from ScottieFox's CAUSTIC//VOLUME (MIT). The original prototype files and license remain preserved in the repository, and the shipped path is a reimplementation on the engine's own WebGPU renderer.