I will present a new modeling approach that simultaneously computes spectra and
light curves and takes into account line blanketing, departures from Local
Thermodynamic Equilibrium, time dependent terms in the radiative-transfer, energy,
and statistical-equilibrium equations, as well as non-thermal processes associated
with radioactive decay. Combined with hydrodynamical inputs of SN ejecta produced
with piston-driven explosions of pre-SN red-supergiant, blue-supergiant, or
Wolf-Rayet stars, we simulate the photometric, spectroscopic, and
spectro-polarimetric evolution from a given time after shock breakout until the
nebular phase. This method applies to any SN ejecta in homologous expansion. I will
present results  for a variety of core-collapse SN types, i.e. including SNe
II-peculiar (specifically SN1987A), II-Plateau, Ib, and Ic, focusing on the
photospheric phase of their evolution.