  We present the basic features and preliminary results of the interface
between our spectro-photometric model GRASIL (that calculates galactic SED from
the UV to the sub-mm with a detailed computation of dust extinction and thermal
reemission) with the semi-analytical galaxy formation model GALFORM (that
computes galaxy formation and evolution in the hierarchical scenario, providing
the star formation history as an input to our model). With these two models we
are able to synthetize simulated samples of a few thousands galaxies suited for
statistical studies of galaxy properties to investigate on galaxy formation and
evolution. We find good agreement with the available data of SED and luminosity
functions.
