id Tech 3

This is a modernized id Tech 3 engine.

Go to Releases section to download latest binaries for your platform.

This repository does not contain any game content from Quake III Arena

Features

Rendering:

• OpenGL renderer
• Vulkan renderer
• Physically Based Rendering
• Spherical Harmonics lighting support
• Screen Space Ambient Occlusion

Audio:

• OpenAL backend with HRTF for 3D positional audio
• Heuristic acoustics: real-time reverb/occlusion using OpenAL EFX
• Supports codecs for mp3, ogg, wav, flac, webm, and opus

Image Generation:

• FLUX.2/FLUX.1 C image generation (optional, text-to-image from console with real-time hot-reloading and device selection; supports flux1-schnell, flux1-dev, flux2-dev; requires model files in game directory; Metal, BLAS, or pure C backend, with graceful fallback)

Standards

• Engine code targets C23, with incremental modernization for safety and portability.
• Engine-internal code prefers native C bool; legacy qboolean is retained where required for compatibility.

Links

• https://idtech3.com
• https://github.com/jksunny/quake3e