  We compute conductivities of strongly-interacting and non-uniform charge
densities dual to inhomogeneous anti-de Sitter--black hole spacetimes.
Backreacting bulk scalars with periodic boundary profiles, we construct
generalizations of Reissner-Nordstr\"om-AdS that interpolate between those used
in two previous studies --- one that reports power-law scaling for the boundary
optical conductivity and one that does not. We find no evidence for power-law
scaling of the conductivity, thereby corroborating the previous negative result
that gravitational crystals are insufficient to generate the power-law
mid-infrared conductivity observed in cuprate superconductors.
