---
title: "Diffuse Radiation in the Galaxy"
authors: ["L. C. Henyey", "J. L. Greenstein"]
year: 1941
venue: "Astrophysical Journal"
arxiv: null
doi: "10.1086/144246"
source: "https://doi.org/10.1086/144246"
topics: [subsurface-scattering]
seed_rank: 1295
seed_batch: "sss-translucent-2026-08-25"
reviewed: "2026-08-25"
pool: "graphics"
relevance_score: 8
lineage: subsurface-scattering
---

# Diffuse Radiation in the Galaxy

## One-sentence takeaway

HG phase function every SSS volume uses.

## Problem

Predecessor chain HG41 → all MC SSS. This paper's job: HG phase function every SSS volume uses.

## Design

HG phase function every SSS volume uses. Lineage: HG41 → all MC SSS.

## Evidence

Astrophysical Journal 1941. DOI `10.1086/144246`. HG phase function every SSS volume uses.

## Limitations

Textbook / classical result, not a renderer. Graphics cites a few chapters or the two-flux formula.

## Implications for Broadside

FMM+RC is Anoptic's far-field 3D GI bet. Participating-media / SSS is the missing local transport operator inside skin, marble, wax, and interiors. Do not claim they already have SSS.

## Bottom line

Mint this 1941 Astrophysical Journal paper. HG phase function every SSS volume uses.

## Links

- DOI: [10.1086/144246](https://doi.org/10.1086/144246)