void instantiateLayer()
{
BrushLayer l = Instantiate(layerPrefab);
l.transform.SetParent(transform);
layerList.Add(l);
Debug.Log("layerList has " + layerList.Count + " layers.");
}
public BrushStroke getLastStroke()
{
BrushLayer layer = layerList[currentLayer];
BrushFrame frame = layer.frameList[layer.currentFrame];
BrushStroke stroke = frame.brushStrokeList[frame.brushStrokeList.Count - 1];
return(stroke);
}