For more information about Embree 3->4 API changes: https://github.com/embree/embree/blob/master/doc/src/api.md#upgrading-from-embree-3-to-embree-4 This is not yet enabling HW RT on Arc GPUs using Embree, which is worked on in https://projects.blender.org/blender/blender/pulls/106266 Co-authored-by: Nikita Sirgienko <nikita.sirgienko@intel.com> Co-authored-by: Stefan Werner <stefan.werner@intel.com> Pull Request: https://projects.blender.org/blender/blender/pulls/105974