Compose geometry
Trace spheres, planes, triangles, and quads through a BVH.
Deterministic path tracing · Ruby
Follow the light.
A pure Ruby path tracer and teaching example for cameras, materials, textures, and acceleration.
gem install caustics
A renderer you can inspect.
Build scenes from small parts, render repeatable samples, and compare backends.
Work with materials
Use Lambertian, metal, dielectric, emission, and image textures.
Render repeatably
Deterministic sampling, depth of field, and process workers where fork exists.
A small first step
Start with one example.
Install the gem, then follow the project guide for platform requirements and the full API.
require "caustics"
scene = Caustics::Scene.build do
sphere center: [0, 0, 0], radius: 0.5,
material: lambertian([0.8, 0.2, 0.2])
end
Caustics.render(scene, width: 320, height: 180,
spp: 16, workers: 4).write("out.png")