/// <summary>
        /// Completes static geometry build process.
        ///  Submits static geometry to physics scene.
        /// </summary>
        private void Seal(Scene scene)
        {
            // Seal static geometry
            staticGeometry.ApplyBuilder();
            staticGeometry.Seal();

            // Create static geometry for physics engine
            physicsMesh = new StaticMesh(
                staticGeometry.PhysicsVertices,
                staticGeometry.PhysicsIndices,
                new AffineTransform(this.matrix.Translation));

            // Add static mesh to physics space
            if (scene != null)
            {
                scene.Space.Add(physicsMesh);
            }
        }
 /// <summary>
 /// Seal billboard static geometry so it can be rendered.
 ///  Only do this once all static billboards have been added.
 /// </summary>
 public void Seal()
 {
     // Seal static geometry
     staticGeometry.ApplyBuilder();
     staticGeometry.Seal();
 }