  The question whether there is a pion transparency in 500 MeV $C(\pi,
\pi^{'})$ scatterings is studied using a semiclassical, hadronic transport
model. The double differential cross sections of this reaction measured at
LAMPF can be largely accounted for, if one uses energy-dependent, anisotropic
angular distributions which are fitted to pion-nucleon scattering data for the
decay of $\Delta(1232)$ and $N^*(1440)$ resonances. The remaining discrepancy
between the data and the calculation sets a limit on effects of more exotic
processes.
