  The quenching of jets (and high-pT particle spectra) observed in heavy-ion
collisions is interpreted as due to the energy lost by hard partons crossing
the Quark Gluon Plasma. Here we review recent efforts to include in its
modeling important qualitative features of QCD, like the correlations in
multiple gluon emissions and the color-flow pattern in parton branchings. In
particular, the modification of color connections among the partons of a shower
developing in the presence of a medium is a generic occurrence accompanying
parton energy-loss. We show how this effect can leave its fingerprints at the
hadronization stage, leading by itself to a softening of hadron spectra and to
an enhanced production of soft particles in jet-fragmentation.
