Quick Start

beginner quick start

Radiant GI (Built-in) · Quick Start

Get Radiant GI running in your Built-in RP project in under five minutes.

Prerequisites: Unity 2022.3+, Built-in Rendering Pipeline project. Deferred rendering path is strongly recommended for best results.

Step 1 — Import the Package

Import Radiant GI from the Unity Asset Store or your local package. The asset installs into Assets/RadiantGI/.

Step 2 — Create a Radiant Volume

  1. Go to GameObject → Create Other → Radiant GI → Radiant Volume
  2. A new Radiant Volume GameObject appears in your scene hierarchy
  3. Select it and either create a new profile or load an existing one from the Assets/RadiantGI/Profiles/ folder

Step 3 — Add the Camera Script

Select your Main Camera and add the Radiant Global Illumination component:

  1. Select the camera in the Hierarchy
  2. Add Component → Radiant Global Illumination

Step 4 — Enter Play Mode

Press Play. You should see indirect lighting appearing in your scene. Select the Radiant Volume to adjust parameters in real time.

Tip: Use Local mode (in the Mode dropdown at the top of the Radiant Volume inspector) to restrict GI to a specific area. Adjust the GameObject’s scale to define the volume bounds — a wireframe box shows the covered area in the Scene view.

Demo Scenes

Two demo scenes are included to help you understand and calibrate the effect:

ScenePurpose
Demo1: CornellBox Calibration scene with no lights — only a white emissive ceiling object. Radiant GI propagates light from the emissive surface to illuminate the room. Ideal for understanding GI intensity and quality settings.
Demo2: Atrium Complex scene with moving emissive objects and dynamic camera. Tests the limits of screen-space GI. Use this to benchmark performance settings.

In each demo, select the Radiant GI Volume GameObject in the Hierarchy to inspect and experiment with settings.

Verify It Works

Open the Debug View option in the Radiant Volume inspector to visualize the GI buffer. You can also enable Compare Mode to see a split-screen comparison with and without GI.

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