Issue with Baked Lightmaps Disappearing After Subscene Closure

Unity Engine
, , ,
1

Hello Everyone,

I’m encountering an issue where baked lightmaps are no longer displayed after I close the Subscene. This only occurs when activating a BakingSystem that divides the World into streamable sections.

Has anyone experienced similar issues or have any insights into why this might happen?

Here’s the relevant code snippet for the system:

 /// <summary>
    /// This system affects a section to all entities in the World depending on their location 
    /// </summary>
    [WorldSystemFilter(WorldSystemFilterFlags.BakingSystem)]
    partial struct SceneStreamingBakingSystem : ISystem
    {
        private struct EntitySection
        {
            public Entity SectionEntity;
            public int Index;
        }

        //Create a native hashmap with region as key and entity section as value
        private NativeHashMap<RegionIndex, EntitySection> _sectionHashMap;

        private EntityQuery _sectionQuery;
        private EntityQuery _query;


        [BurstCompile]
        public void OnUpdate(ref SystemState state)
        {
            //Init the native hashmap of 
            if (!_sectionHashMap.IsCreated)
                _sectionHashMap = new NativeHashMap<RegionIndex, EntitySection>(256, Allocator.Temp);


            var ecb = new EntityCommandBuffer(Allocator.Temp);
            _query = SystemAPI.QueryBuilder().WithAll<LocalToWorld>().WithAny<MaterialMeshInfo, PhysicsCollider>()
                .WithNone<KinematicCharacterBody, SkipSceneStreaming>().Build();
            var transforms = _query.ToComponentDataArray<LocalToWorld>(Allocator.Temp);
            var entities = _query.ToEntityArray(Allocator.Temp);


            //Query for entities that have local transform component
            for (int i = 0; i < entities.Length; i++)
            {
                var transform = transforms[i];
                var entity = entities[i];

                //Define the region that this transform belongs to
                var currentRegion = new RegionIndex(transform.Position, 100);

                //Create section entity if doesn't exist
                if (!_sectionHashMap.TryGetValue(currentRegion, out var sectionEntity))
                {
                    sectionEntity.Index = _sectionHashMap.Count + 1;
                    //create scene section
                    sectionEntity.SectionEntity = SerializeUtility.GetSceneSectionEntity(sectionEntity.Index,
                        state.EntityManager, ref _sectionQuery);

                    //Add key and value to the map
                    _sectionHashMap.Add(currentRegion, sectionEntity);

                    //Add a position to the current section entity
                    ecb.AddComponent(sectionEntity.SectionEntity, new LocalTransform()
                    {
                        Position = currentRegion.GetRegionCenter()
                    });
                }


                // Affect the section to the current entity 
                var sceneSection = state.EntityManager.GetSharedComponent<SceneSection>(entity);
                ecb.AddSharedComponent(entity, new SceneSection
                {
                    SceneGUID = sceneSection.SceneGUID,
                    Section = sectionEntity.Index
                });
            }

            if (ecb.ShouldPlayback) ecb.Playback(state.EntityManager);
            ecb.Dispose();

            if (_sectionHashMap.IsCreated)
                _sectionHashMap.Dispose();
        }
    }

Any thoughts on what could be causing the lightmaps to disappear?

Thanks in advance for your help!

2

Hello Unity,
Anything about this bug ?