  Any traversally generic vector flow on a compact manifold $X$ with boundary
leaves some residual structure on its boundary $\d X$. A part of this structure
is the flow-generated causality map $C_v$, which takes a region of $\d X$ to
the complementary region. By the Holography Theorem from \cite{K4}, the map
$C_v$ allows to reconstruct $X$ together with the unparametrized flow. The
reconstruction is a manifestation of holographic description of the flow.
  In the paper, we introduce and study the holographic structures on a given
closed manifold $Y$, which mimics $\d X$. We generalize the Holography Theorem
so that is stated in terms of fillable holographic structures on $Y$. Such
structures are intimately linked with traversally generic vector flows on
manifolds $X$ whose boundary is $Y$. We conclude with few observations about
the richness of holographic structures on smooth exotic spheres.
