In our forum post Update on Global Illumination 2021, we provided more information about our roadmap for Global Illumination and our plans for deprecating Enlighten. It is important to note that Enlighten Realtime GI is not affected at this time.

For Baked Global Illumination, we remain focused on improving the stability and reach of Unity’s GPU Lightmapper. We are doing this so that we can deliver a solution that is fast, stable, and more accessible to more of you.

As part of this aim, we are following through on our deprecation path for Enlighten, starting with Enlighten Baked GI. Unity’s Lightmappers offer an alternative to Enlighten Baked GI and have been in use for a number of releases. We recommend those of you who are currently using Enlighten Baked GI and intend to upgrade to 2022.2 or later, to transition to Unity’s Lightmappers and start new projects with these Lightmappers from the 2022.2 release.

You will notice that, with the 2022.2 release, Enlighten Baked GI has been marked as obsolete in the API, and, by default, this has been hidden as an option for generating Baked GI in Unity’s Lighting settings in the Editor. Those of you upgrading to the 2022.2 Unity release and using Enlighten Baked GI in your existing projects will find your Lighting settings automatically changed to Progressive CPU baking instead (or Progressive GPU for Apple silicon devices). From here, you can choose to use either Unity’s CPU or GPU Progressive Lightmappers going forward.

During this transition from Enlighten Baked GI to Unity’s Lightmappers, we understand that you might wish to continue using Enlighten Baked GI. If you need Enlighten Baked GI to assist with your transition, we have made it possible for you to reactivate Enlighten Baked GI via a toggle in the settings under Edit > Project Settings > Graphics. However, this setting will be removed with the 2023.1 release.

We want you to succeed as you transition from Enlighten Baked GI to Unity’s Lightmappers. If you encounter any issues, please post your feedback on Unity’s Global Illumination forum, or submit a bug using Unity QA – Bug reporting.

Source: Unity Technologies Blog