The radiative transfer through a region with stochastic clumps is studied i
nto an abstract Banach space setting. The distribution of clumps is describ
ed by means of an observation-related statistics. By using a projection tec
hnique, sequences of evolution equations, which approximate the exact equat
ion for the expectation, are deduced. (C) 2001 Published by Elsevier Scienc
e B.V.