QuestSaturationExperiment Full-Field Color Manipulation Library for Meta Quest 3
Author: Ryo Matsuzaki License: MIT
A Unity project for manipulating the saturation of the entire passthrough view on Meta Quest 3 in real time. It calls OVRPassthroughLayer.SetBrightnessContrastSaturation every frame, which prevents the Building Blocks passthrough pipeline from silently overwriting the layer, and lets you drive the whole-field saturation anywhere in [-1, +1].
A small 3-condition selection task (no change / strong desaturation / strong over-saturation) is bundled as an example use case.
Requirements Unity 6000.3.7f1 / URP 17.3 / Meta XR SDK 201.0.0 / OpenXR 1.16 / Meta Quest 3 (Android build).
Scripts Everything lives in Assets/Scripts/.
SaturationController.cs — the core component. Holds an OVRPassthroughLayer reference and re-applies brightness / contrast / saturation every frame. Call SetSaturation(float) from anywhere to drive it. SaturationCurve.cs — per-condition target value and time profile (3 s hold at 0, 10 s linear ramp, then held). ConditionSelector.cs — right-controller raycast UI for picking one of three spheres. SphereOption.cs — a selectable sphere (scale + emission on hover). ExperimentManager.cs — two-phase state machine (Selection / Experiment). Hold the right A button for 2 s to return to Selection. Saturation targets per condition:
A: 0.0 B: -0.8 C: +0.8 Minimal usage If you only need the library part, assign your OVRCameraRig's OVRPassthroughLayer to a SaturationController and call:
saturationController.SetSaturation(-0.8f); // strong desaturation Setup Open the project in Unity 6000.3.7f1 and let packages resolve. Open Assets/Scenes/PassthroughScene.unity. Switch the build target to Android, connect a Meta Quest 3 over USB, and Build & Run. Passthrough cannot be previewed in the Editor, so verify on the device.
Controls Aim with the right controller, confirm with the index trigger, and hold the right A button for 2 s to reset to the selection screen.
License MIT License. See LICENSE.
Citation If you use this software in academic work, please cite: Ryo Matsuzki, [software name], 2026.