  Detailed observations of gaps in protoplanetary disks have revealed
structures that drive current research on circumstellar disks. One such feature
is the two intensity nulls seen along the outer disk of the HD 142527 system,
which are particularly well traced in polarized differential imaging. Here we
propose that these are shadows cast by the inner disk. The inner and outer disk
are thick, in terms of the unit-opacity surface in H-band, so that the shape
and orientation of the shadows inform on the three-dimmensional structure of
the system. Radiative transfer predictions on a parametric disk model allow us
to conclude that the relative inclination between the inner and outer disks is
70+-5 deg. This finding taps the potential of high-contrast imaging of
circumstellar disks, and bears consequences on the gas dynamics of gapped
disks, as well as on the physical conditions in the shadowed regions.
