  The effects of the variation of vector meson masses and decay widths on
photon production from hot strongly interacting matter formed after Pb + Pb and
S + Au collisions at CERN SPS energies are considered. It has been shown that
the present photon spectra measured by WA80 and WA98 Collaborations can not
distinguish between the formation of quark matter and hadronic matter in the
initial state.
