  We directly calculate spectral functions in the O(N)-model at finite
temperature within the framework of the Functional Renormalization group.
Special emphasis is put on a fully numerical framework involving
four-dimensional regulators preserving Euclidean O(4) and Minkowski Lorentz
invariance, an important prerequisite for future applications. Pion and sigma
meson spectral functions are calculated for a wide range of temperatures across
the phase transition illustrating the applicability of the general framework
for finite temperature applications. In addition, various aspects concerning
the interplay between the Euclidean and real time two-point function are
discussed.
