This page lists changes in Unity 2023.1 which might affect existing projects when you upgrade them from a 2022 LTS version to 2023.1.
LightingSettings are now floating point valuesThis upgrade guide describes how to upgrade to version 2023.1 of Unity’s built-in render pipeline. To upgrade other render pipelines to version 2023.1, see:
To upgrade other packages, refer to the documentation for the packages you are using.
The Progressive Lightmapper includes a Gaussian option among its Advanced filtering options (Lighting Window > Lightmapping Settings > Filtering > Direct Filter > Gaussian). The Radius control for Gaussian filtering now supports decimal increments, such as 0.5. Previously, this control only supported integer steps (1 to 5).
As a result of this change, these properties are now deprecated in the C# API:
int LightingSettings.filteringGaussRadiusAOint LightingSettings.filteringGaussRadiusDirectint LightingSettings.filteringGaussRadiusIndirectThe floating point replacements for the deprecated properties are:
float LightingSettings.filteringGaussianRadiusAOfloat LightingSettings.filteringGaussianRadiusDirectfloat LightingSettings.filteringGaussianRadiusIndirectYou can call one of the deprecated member functions to round the Gaussian filter radius to the nearest integer.
Light Probes are now as bright as lightmapsA pre-rendered texture that contains the effects of light sources on static objects in the scene. Lightmaps are overlaid on top of scene geometry to create the effect of lighting. More info
See in Glossary. Previously, Unity’s Light ProbesLight probes store information about how light passes through space in your scene. A collection of light probes arranged within a given space can improve lighting on moving objects and static LOD scenery within that space. More info
See in Glossary were only 94% as bright as they should be. For this reason, objects lit with light probes appeared a bit darker than objects lit with lightmaps. Because of the subtlety of this change, it is possible that many users won’t see a noticeable difference.
Should you prefer the old appearance, you can achieve it in the following way:
The EnlightenA lighting system by Geomerics used in Unity for Enlighten Realtime Global Illumination. More info
See in Glossary Baked Global IlluminationA group of techniques that model both direct and indirect lighting to provide realistic lighting results.
See in Glossary lightmapping backend is no longer available.
When you upgrade a project to this version, Unity removes the Enlighten baking backend from the lightmapperA tool in Unity that bakes lightmaps according to the arrangement of lights and geometry in your scene. More info
See in Glossary selection dropdown and substitutes a Progressive Lightmapper in every SceneA Scene contains the environments and menus of your game. Think of each unique Scene file as a unique level. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. More info
See in Glossary where you’ve selected the Enlighten baking backend.
On Apple silicon devices, Unity substitutes the Progressive GPU Lightmapper for the Enlighten baking backend. On all other devices, Unity selects the CPU Progressive Lightmapper.
Enlighten precomputed Realtime Global Illumination is still available and is supported up until Unity 2024 LTS.
The UnityPlayer Java class has been replaced by two new bridge classes, UnityPlayerForActivityOrService and UnityPlayerForGameActivity. These new classes both derive from UnityPlayer, but public methods such as displayChanged and windowFocusChanged have moved from UnityPlayer specifically to UnityPlayerForActivityOrService.
If you extend the default Unity activity and use the UnityPlayer class, you might encounter compile errors. In this case, rename UnityPlayer to UnityPlayerForActivityOrService.
The UnityPlayer Java class no longer extends FrameLayout. If you need to access FrameLayout, call the getFrameLayout function on the UnityPlayer instance.
RenderPipelineEditorUtility.FetchFirstCompatibleTypeUsingScriptableRenderPipelineExtension is now deprecated. Use GetDerivedTypesSupportedOnCurrentPipeline instead. This method’s signature is also different; now it returns all derived types, not just the first one it encounters. This prevents inconsistencies, because Unity does not guarantee type order.
CustomEditorForRenderPipelineAttribute and VolumeComponentMenuForRenderPipelineAttribute are now deprecated. Use CustomEditor and VolumeComponentMenu instead. To restrict the choice of pipeline when these attributes are active, combine them with SupportedOnRenderPipelineAttribute and specify a RenderPipelineAsset type. If you want to activate an SRP attribute that does work with the Built-In Render Pipeline, use SupportedOnRenderPipelineAttribute without parameters. This provides a unified workflow for both attributes when there’s a need to activate them on a specific pipeline.
A new API to modify the Android GradleAn Android build system that automates several build processes. This automation means that many common build errors are less likely to occur. More info
See in Glossary project was introduced. The API can be used to replace the old Android Gradle templates workflow. Templates will still work as before if the new API is not used.
To use the new API a Templates Upgrader can be used: