RayEmissionAngleGaussianNoise is RayEmissionDistortion:
    .doc: """
    Distortion of the ray emission angle, as relative to the local optical system of the ray. The
    optical system is assumed to be right handed with the Z-axis pointing along the ray traversal
    direction.
    """
    gaussian_distribution is Math.Random.GaussianDistribution
    rotation_axis is Math.Vec3
