Solving the radiative transfer problem is a common problematic to
may fields in astrophysics. With the increasing angular resolution
of spatial or ground-based telescopes (VLTI, HST) but also with the
next decade instruments (NGST, ALMA, ...), astrophysical objects reveal and will certainly reveal complex spatial structures.
Consequently, it is necessary to develop numerical tools being able
to solve the radiative transfer equation in three dimensions in
order to model and interpret these observations. I present a 3D
radiative transfer program, using a new method for the construction
of an adaptive spatial grid, based on the Monte Claro method. With
the help of this tools, one can solve the continuum radiative
transfer problem (e.g. a dusty medium), computes the temperature
structure of the considered medium and obtain the flux of the object
(SED and images).