/// <summary>
/// Call regularly to update durationeffect progress.
/// </summary>
/// <param name="Tick"></param>
/// <param name="Span"></param>
public void Tick(double Tick, double Span)
{
// update duration effects
invert.Update(Tick);
pain.Update(Tick);
whiteout.Update(Tick);
blur.Update(Tick);
flashxlat.Update(Tick);
}
