public override unsafe void ProcessItems(Dictionary<short, MyLodEnvironmentItemSet> items, List<MySurfaceParams> surfaceParamsPerLod, int[] surfaceParamLodOffsets, int changedLodMin, int changedLodMax)
        {
            m_minScannedLod = changedLodMin;

            using (var batch = new MyEnvironmentModelUpdateBatch(Sector))
                foreach (var group in items)
                {
                    MyRuntimeEnvironmentItemInfo it;
                    Sector.GetItemDefinition((ushort)group.Key, out it);
                    MyDefinitionId modelCollection = new MyDefinitionId(typeof(MyObjectBuilder_PhysicalModelCollectionDefinition), it.Subtype);

                    MyPhysicalModelCollectionDefinition modelCollectionDef = MyDefinitionManager.Static.GetDefinition<MyPhysicalModelCollectionDefinition>(modelCollection);
                    if (modelCollectionDef != null)
                    {
                        var info = group.Value;
                        int offt = info.LodOffsets[changedLodMin];

                        for (int i = offt; i < info.Items.Count; ++i)
                        {
                            var position = info.Items[i];

                            if (m_disabledItems.Contains(position) || IsObstructed(position)) continue;
                            var modelDef = modelCollectionDef.Items.Sample(MyHashRandomUtils.UniformFloatFromSeed(position));

                            batch.Add(modelDef, position);
                        }
                }
            }
        }
        public virtual void ProcessItems(Dictionary<short, MyLodEnvironmentItemSet> items, List<MySurfaceParams> surfaceParamsPerLod, int[] surfaceParamLodOffsets, int changedLodMin, int changedLodMax)
        {
            using (var batch = new MyEnvironmentModelUpdateBatch(Sector))
                foreach (var group in items)
                {
                    MyRuntimeEnvironmentItemInfo it;
                    Sector.GetItemDefinition((ushort)group.Key, out it);
                    MyDefinitionId modelCollection = new MyDefinitionId(typeof(MyObjectBuilder_PhysicalModelCollectionDefinition), it.Subtype);

                    MyPhysicalModelCollectionDefinition modelCollectionDef = MyDefinitionManager.Static.GetDefinition<MyPhysicalModelCollectionDefinition>(modelCollection);
                    if (modelCollectionDef != null)
                    {
                        foreach (var position in group.Value.Items)
                        {
                            var sample = MyHashRandomUtils.UniformFloatFromSeed(position);
                            var modelDef = modelCollectionDef.Items.Sample(sample);

                            batch.Add(modelDef, position);
                        }
                    }
                }
        }