Upgrading HDRP from 2023.1 to 2023.2

In the High Definition Render Pipeline (HDRP), some features work differently between major versions. This document helps you upgrade HDRP from 15.x to 16.x.

Adaptive Probe Volume

HDRP version 16 uses Probe Volumes for light probe systems by default.

LOD dithering

HDRP 16 deprecates the supportDitheringCrossFade setting in the HDRP Asset. Instead, use the Quality Settings property enableLODCrossFade. When you upgrade to 2023.2 HDRP automatically sets the Quality Settings property enableLODCrossFade to True if you enabled it in the HDRP Asset.

Decals in HDRP Path Tracer

HDRP 16 includes path tracer decal rendering, which means you might need to increase the Maximum Lights per Cell (Ray Tracing) value and the size of the decal atlas to render decals correctly.

Default Volume Profile

The HDRP Default Volume defines the default values for the Default layer and all other volume layers.

Light Baking

From version 16, baked probe volumes and lightmaps that contain lights that use the Mixed mode take the Intensity multiplier property into account.

Volume Framework

When you create a custom Volume component class that overrides the VolumeComponent.Override(VolumeComponent state, float interpFactor) method, your implementation must set the VolumeParameter.overrideState property to true whenever the VolumeParameter value is changed. This ensures that the Volume framework resets the parameters to their correct default values. This lets the framework to use fewer resources every frame which improves performance.

For an example, refer to the Override(VolumeComponent, float) description.