# PaperMC/Starlight

Rewrites the light engine to fix lighting performance and lighting errors

Repository: https://github.com/PaperMC/Starlight
Canonical: https://ross.abutalabs.com/products/papermc-starlight
Language: Java
License: NOASSERTION
License Family: other
Topics: fabric, forge, java, light-engine, minecraft, minecraft-performance
Archived: true
Last push: 2024-03-08T12:47:55+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2110, "days_push": 908, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1262, forks 129 (observed 2026-08-28T04:04:10.266378+00:00)

## What it is
Starlight is a Fabric/Forge mod that completely rewrites Minecraft's vanilla light engine to fix lighting performance and lighting errors. It is also used as the light engine basis for Paper's chunk system rewrite and Folia.

## Use cases
- reduce server lag from light updates in minecraft
- fix lighting bugs and errors in minecraft worlds
- speed up chunk generation lighting
- make block place/break light updates faster
- optimize minecraft server performance
- enable parallel light updates on modded servers

## When to choose
- you run a Fabric or Forge modded server on Minecraft 1.20 or earlier and suffer from lighting-related lag
- you want faster chunk generation and block update light propagation
- you need the light engine used by Paper's chunk system rewrite or Folia

## When to avoid
- you play on Minecraft versions past 1.20, where the project will not receive further updates
- you expect client-side FPS improvements, since the mod mainly affects server-side light update times
- you need a maintained project with active development

## Facets
- artifact type: plugin
- maturity: maintenance
- function: game-engine
- domain: gaming-tools, performance
- platform: jvm, cross-platform
- tags: light-engine, fabric-mod, forge-mod, minecraft-server, lighting-optimization, performance, minecraft

## Member repositories
- PaperMC/Starlight (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:10.266378+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T05:04:13.102499+00:00, confidence not recorded.
  - readme: https://github.com/PaperMC/Starlight (fetched 2026-08-28T04:04:10.266378+00:00, sha bed102620ca1)
- Data as of 2026-08-30T08:39:29.467469+00:00.