Thanks for trying Unity MARS in this first month. Our latest patch release is out, with these key fixes: Simulation Environment GameObject Inspectors are no longer locked when URP or Composite Fallback is enabled. URP crash issue fixed when having Simulation View open while using URP. Simulation Environment lighting will not be lost when undoing after environment is loaded or after editor nUnit tests are run. Other bugfixes and quality-of-life improvements. More detail is provided at com.unity.mars/CHANGELOG.md You may upgrade existing projects using Package Manager, updating the version in your packages.json, or using MARS_Installer.unitypackage. Enjoy and let us know what you think.