internal void ExecuteSpawn()
            {
                lock (this)
                {
                    if (m_removeQueued || !m_spawnQueued)
                    {
                        return;
                    }
                    if (VoxelMap == null)
                    {
                        var mat = MatrixD.CreateFromQuaternion(Rotation);
                        mat.Translation = WorldPosition;
                        var genSeed = WorldPosition.GetHashCode();
                        if (VoxelUtility.TryFindAsteroidSeed(ref genSeed, Size, SeedSpecs.ProhibitsOre, SeedSpecs.RequiresOre, 10) || !SeedSpecs.ExcludeInvalid)
                        {
                            VoxelMap = VoxelUtility.SpawnAsteroid(new MyPositionAndOrientation(mat),
                                                                  VoxelUtility.CreateProceduralAsteroidProvider(genSeed, Size));
                            VoxelMap.OnPhysicsChanged += MarkForSave;
                        }
                    }

                    m_spawnQueued  = false;
                    m_removeQueued = false;
                }
            }