middle[0] = (Points[0][0] + Points[1][0] + Points[2][0]) / 3;
                middle[1] = (Points[0][1] + Points[1][1] + Points[2][1]) / 3;
                middle[2] = (Points[0][2] + Points[1][2] + Points[2][2]) / 3;
                l[0] = light[0] - middle[0]; l[1] = light[1] - middle[1]; l[2] = light[2] - middle[2];

                if (l.Multiply(NormalVectors[0]) <= 0)
                    return;