---
title: "A Dual-Beam 3D Searchlight BSSRDF"
authors: ["Eugene d'Eon"]
year: 2013
venue: "arXiv / SIGGRAPH Talks"
arxiv: "1311.0955"
doi: "10.48550/arxiv.1311.0955"
source: "https://doi.org/10.48550/arxiv.1311.0955"
topics: [subsurface-scattering]
seed_rank: 1304
seed_batch: "sss-translucent-2026-08-25"
reviewed: "2026-08-25"
pool: "graphics"
relevance_score: 8
lineage: subsurface-scattering
cites:
  - title: "The Rendering Equation"
    url: "https://doi.org/10.1145/15922.15902"
    year: 1986
    arxiv: null
    doi: "10.1145/15922.15902"
  - title: "A Quantized-Diffusion Model for Rendering Translucent Materials"
    url: "https://doi.org/10.1145/1964921.1964951"
    year: 2011
    arxiv: null
    doi: "10.1145/1964921.1964951"
see:
  - "152-the-rendering-equation"
  - "1253-a-quantized-diffusion-model-for-rendering-translucent-materials"
---

# A Dual-Beam 3D Searchlight BSSRDF

## One-sentence takeaway

Fully 8D searchlight BSSRDF; Placzek dual-beam.

## Problem

Predecessor chain QD radial Rd is 2D → 8D searchlight. This paper's job: Fully 8D searchlight BSSRDF; Placzek dual-beam.

## Design

Fully 8D searchlight BSSRDF; Placzek dual-beam. Lineage: QD radial Rd is 2D → 8D searchlight.

## Evidence

arXiv / SIGGRAPH Talks 2013. DOI `10.48550/arxiv.1311.0955`. arXiv `1311.0955`. Fully 8D searchlight BSSRDF; Placzek dual-beam.

## Limitations

Talk or course notes, not a full TOG derivation. Use the PDF/DOI in Links; do not invent a journal version.

## Implications for Broadside

Anoptic has a forward+ mesh renderer and is betting on FMM+RC 3D GI. Translucent materials / SSS is the missing appearance model for skin, marble, wax, leaves, and interiors. Do not claim they already have SSS.

## Bottom line

Mint this 2013 arXiv / SIGGRAPH Talks paper. Fully 8D searchlight BSSRDF; Placzek dual-beam.

## Links

- DOI: [10.48550/arxiv.1311.0955](https://doi.org/10.48550/arxiv.1311.0955)
- arXiv: [1311.0955](https://arxiv.org/abs/1311.0955)