Ray-Traced Global Illumination

Ray-Traced Global Illumination is a ray tracing feature in the High Definition Render Pipeline (HDRP). It is a more accurate alternative to Screen Space Global Illumination, Light Probes and lightmaps.

Ray-Traced Global Illumination off

Ray-Traced Global Illumination on

For information about ray tracing in HDRP, and how to set up your HDRP Project to support ray tracing, see Getting started with ray tracing.

Using Ray-Traced Global Illumination

1. Because this feature replaces the Screen Space Global Illumination Volume override, the initial setup is very similar. To setup ray traced global illumination, first follow the Enabling Screen Space Global Illumination and Using Screen Space Global Illumination steps. After you setup the Screen Space Global Illumination override, to make it use ray tracing:
   1. In the Frame Settings for your Cameras, enable Ray Tracing.
   2. Select the Screen Space Global Illumination override and, in the Inspector, enable Ray Tracing. If you do not see a Ray Tracing option, make sure your HDRP Project supports ray tracing. For information on setting up ray tracing in HDRP, see Getting started with ray tracing.

Properties

HDRP implements ray-traced global illumination on top of the Screen Space Global Illumination override. For information on the properties that control this effect, see Ray-traced properties.