---
title: "Fast separation of direct and global components of a scene using high frequency illumination"
authors: ["Shree K. Nayar", "Gurunandan Krishnan", "Michael D. Grossberg", "Ramesh Raskar"]
year: 2006
venue: "ACM SIGGRAPH 2006 Papers on - SIGGRAPH '06"
arxiv: null
doi: "10.1145/1179352.1141977"
source: "https://doi.org/10.1145/1179352.1141977"
topics: [translucent-materials]
seed_rank: 1316
seed_batch: "sss-translucent-2026-08-25"
reviewed: "2026-08-25"
pool: "graphics"
relevance_score: 8
lineage: translucent-materials
cites:
  - title: "Acquiring Scattering Properties of Participating Media by Dilution"
    url: "https://doi.org/10.1145/1141911.1141986"
    year: 2006
    arxiv: null
    doi: "10.1145/1141911.1141986"
see:
  - "1327-acquiring-scattering-properties-of-participating-media-by-dilution"
---

# Fast separation of direct and global components of a scene using high frequency illumination

## One-sentence takeaway

Nayar 2006: the measurement primitive that isolates subsurface/global from surface; used on translucent objects.

## Problem

Predecessor chain photometric stereo; structured light. This paper's job: Nayar 2006: the measurement primitive that isolates subsurface/global from surface; used on translucent objects.

## Design

Nayar 2006: the measurement primitive that isolates subsurface/global from surface; used on translucent objects. Lineage: photometric stereo; structured light.

## Evidence

ACM SIGGRAPH 2006 Papers on - SIGGRAPH '06 2006. DOI `10.1145/1179352.1141977`. Nayar 2006: the measurement primitive that isolates subsurface/global from surface; used on translucent objects.

## Limitations

Read the cited predecessors before treating this as a drop-in Anoptic shader. Do not claim the library already implements it.

## Implications for Broadside

Anoptic has a forward+ mesh renderer and is betting on FMM+RC 3D GI. Skin is the first character-appearance hole: translucent dermis, not another BRDF lobe. Do not claim Anoptic already has SSS.

## Bottom line

Mint this 2006 ACM SIGGRAPH 2006 Papers on - SIGGRAPH '06 paper. Nayar 2006: the measurement primitive that isolates subsurface/global from surface; used on translucent objects.

## Links

- DOI: [10.1145/1179352.1141977](https://doi.org/10.1145/1179352.1141977)