  The equations of motion of toroidal orientifold compactifications with fluxes
are in one-to-one correspondence with gauged supergravity if the orientifold
(and D-brane) sources are smeared over the compact space. This smeared limit is
identical to the approximation that ignores warping. It is therefore relevant
to compare quantities obtained from the gauged supergravity with the true 10d
solution with localised sources. In this paper we find the correspondence
between BPS domain walls in gauged SUGRA and 10D SUGRA with localised sources.
Our model is the simplest orientifold with fluxes we are aware of: an O6/D6
compactification on T^3/Z_2 in massive IIA with H_3-flux. The BPS domain walls
correspond to a O6/D6/NS5/D8 bound state. Our analysis reveals that the domain
wall energy computed in gauged SUGRA is unaffected by the localisation of the
O6/D6 sources.
