public OpticalAmbience Transform(Matrix44 mat)
        {
            OpticalAmbience ret = new OpticalAmbience(this);

            for (int i = 0; i < NLights(); i++)
            {
                ret.SetLight(i, ret.GetLight(i).Transform(mat));
            }
            return(ret);
        }
 public OpticalAmbience(OpticalAmbience oa)
 {
     iris   = 1.0D;
     lights = new ArrayList();
     iris   = oa.iris;
     for (int i = 0; i < NLights(); i++)
     {
         AddLight(oa.GetLight(i));
     }
 }