029 · Octane
— De decompositione luminis per refractionem. —
Project Lavos · The Stack · § I

Lumen non est unum.

— LIGHT IS NOT ONE — OTOY · UNBIASED SPECTRAL PATH TRACER · 2010 —

Octane.

380 nm 780 nm

Newton split a beam through a prism and saw, for the first time, that white was a composition. Three centuries later Octane built that same observation into a GPU and called it spectral path tracing. A single ray is never one ray. It is a parliament of wavelengths, each one refracting at its own angle.

FIG. I — Dispersion of a coherent beam through borosilicate glass (nD = 1.517) under unbiased spectral integration.
SPECTRAL · 12 SAMPLES
Wavelength Samples 12 · per ray
CIE 1931 · Dominant λ — — nm
IOR · Cauchy A · B 1.517 · 4928
SPP / Frame 1 · unbiased
SPECTRAL ENERGY ·
0.74 rel.

The figure above is computed live in a single fragment shader. Each pixel casts rays through twelve sampled wavelengths between 380 and 780 nm; each wavelength refracts at its own index per Cauchy's equation n(λ) = A + B/λ²; the resulting twelve color contributions are converted to RGB through approximated CIE 1931 color matching functions and summed. There is no scene graph — only the shader, the equation, and the boundary condition. This is what Octane does, in a small.

Production · Render Configuration — masthead —
Vendor
OTOY · Inc.
Hosts
Cinema 4D · Blender · Houdini · Maya · Lightwave · 3ds Max · Standalone
First Ship
2010 · alpha · 2012 · 1.0
Architecture
Unbiased · GPU · Spectral · Brute Force · CUDA + OptiX + Metal
Acquired
OTOY acquires Refractive Software · 2012
Native To
Motion design · everydays · keynote graphics · music videos
Equation
n(λ) = 1.5046 + 4928 / λ² · borosilicate

— Frames Refracted (Selected) —

  1. Beeple. Everydays — the entire 5,000+ day series. Personal archive, OTOY-sponsored from #2,500.2007 — ongoing
  2. Westworld. HBO. Main title sequence. Patrick Clair / Elastic.2016
  3. Tame Impala. Borderline (music video). Joey Choi.2019
  4. Game of Thrones. Season 8 broadcast graphics package. HBO.2019
  5. The Mandalorian. Pre-visualisation passes. Lucasfilm.2019 — 2023
  6. Drake — God's Plan. Music video color and rotoscope assists.2018
  7. Apple. WWDC keynote graphics packages.2017 — ongoing
  8. Marvel Studios. Logo treatments and stinger sequences.2018 — ongoing

— Lineage —

2010Refractive Software (Auckland) writes the first GPU-accelerated unbiased renderer.
2011Public alpha. The same scene that Mental Ray solved overnight resolves in minutes.
20121.0 ships. OTOY acquires Refractive. Network rendering announced.
2013Octane Render Cloud unveiled — render-as-a-service before the term existed.
2015Octane 3. VR rendering. Volumetric OpenVDB integration.
2018Octane 4. AI-trained denoiser. Light AOVs become per-light, not per-pass.
2020Octane 2020 — Brigade engine fold-in. Out-of-core geometry. Path-guiding.
2022Hardware ray-tracing on RTX consumer cards. Render times collapse again.
2024Octane X — Apple Silicon native via Metal. Vectron procedurals. Spectrals everywhere.

light is not one.

It never was. Octane just got the GPU to admit it.

— § I · Authoring · Renderers / Production —
Plate XXIX · MMXXVI
projectlavos-bauhaus · 029