I present preliminary work in applying three-dimensional radiative transfer calculations to neutron-
star mergers with realistic ejecta masses. Our calculations include line-by-line opacities for tens of
millions of atomic transitions, composition from an r-process nuclear network, and time-dependent
thermalization of decay products from individual 𝛼 and 𝛽- decay reactions. I apply a new atomic
dataset for lanthanides that has been wavelength-calibrated to a complete 2D ejecta model, as well
as several parameterised, scaled versions of the 3D dynamical ejecta.