  We show that the consistent completion of an initial scattering diagram in
$M_{\mathbb{R}}$ (for a finite rank lattice $M$) can be expressed quite
generally in terms of the Jeffrey-Kirwan residues of certain explicit
meromorphic forms, by using the Maurer-Cartan asymptotic analysis developed by
Chan-Leung-Ma and Leung-Ma-Young. A similar result holds for the associated
theta functions.
