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google/filament

Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2

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google/filament has 20k+ stars and 2k+ forks on GitHub, is written in C++, and was last pushed on Oct 14, 2026. Data as of . Signed-in members get hourly updates — create a free account.

Summary Information

Updated 4 hours ago
Type:Library / SDKCategory(s):Graphics, Rendering & 3DGame DevelopmentMedia, Graphics & Games
Added to GitGenius on September 2nd, 2026
Created on August 3rd, 2018
Open Issues & Pull Requests: 229 (+7)
GitHub issues: Enabled
Number of forks: 2,280
Total Stargazers: 20,604 (+3)
Total Subscribers: 381 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 11.6 hours
Mean response time: 4.4 days
90th percentile: 8.7 days
Tracked items: 390

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Maintainer activity

9 people did triage or write work on this repository in the last 12 months.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 11, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits.

How this project is maintained

Around half of the issues opened in the past year never receive a reply. 97% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. Work labelled "metal" is answered fastest, typically in under an hour, while "security" waits about 2 days. 44% of tracked open issues have had no activity in three months. Only 7% of issues opened in the past year have been closed.

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Issue Activity (beta)

Open issues: 175
New in 7 days: 2
Closed in 7 days: 2
Avg open age: 808 days
Stale 30+ days: 164
Stale 90+ days: 144

Recent activity

Opened in 7 days: 0
Closed in 7 days: 2
Comments in 7 days: 1
Events in 7 days: 5

Top labels

  • gltf (46)
  • android (28)
  • low priority (28)
  • build (27)
  • vulkan (23)
  • gpu specific (21)
  • opengl (19)
  • security (19)

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Detailed Description

Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2.

Filament addresses the need for efficient, lightweight rendering on mobile platforms while maintaining visual quality through physically based rendering techniques. The engine is optimized for minimal size and performance on Android, supporting multiple graphics APIs including OpenGL ES, Vulkan, Metal, and WebGL2. It includes a material system with a dedicated compiler (matc) that generates optimized shaders, and provides a glTF 2.0 loader for asset import. The tool is distributed as precompiled binaries through Maven Central for Android and CocoaPods for iOS, with source builds available for other platforms.

Filament suits developers building 3D graphics applications on mobile platforms where resource constraints matter, or cross-platform projects targeting both mobile and desktop. The engine is particularly valuable for teams that need physically based rendering without the overhead of larger graphics frameworks. Android developers benefit from Maven dependency integration and modular libraries covering rendering, asset loading, and utilities. The project provides comprehensive documentation on PBR theory and its material system, making it accessible to graphics programmers learning physically based rendering concepts.

The project maintains active development with regular releases that bundle host-side tools required for asset generation. Documentation is thorough and kept current, covering both theoretical foundations and practical implementation details. The codebase receives ongoing optimization work, particularly around shader compilation and cross-platform graphics API support.