Rauzy fractals are compact sets with fractal boundary that can be associated with any
unimodular Pisot irreducible substitution. These fractals can be defined as the Hausdorff
limit of a sequence of compact sets, where each set is a renormalized projection of a
finite union of faces of unit cubes. We exploit this combinatorial definition to prove the
connectedness of the Rauzy fractal associated with any finite product of three-letter
Arnoux–Rauzy substitutions.