Φ_sc distribution for our test case similarly to Fig. A.1. The azimuthal scattering angle distribution does not depend on the energy but it is dramatically reduce as Θ_sc tends to zero. We did, indeed, notice a slight reduction of the modulation for the photons which are more likely forward scattered (red line). However this effect is is significant only for photons scattered at Θ_sc ∼ 0.