  Effects of the choice of the freeze-out hypersurface and resonance decays on
the HBT interferometry in relativistic heavy-ion collisions are studied in
detail within a class of models with single freeze-out. The Monte-Carlo method,
as implemented in THERMINATOR, is used to generate hadronic events describing
production of particles from a thermalized and expanding source. All
well-established hadronic resonances are included in the analysis as their role
is crucial at large freeze-out temperatures. We use the two-particle method to
extract the correlation functions, which allows us to study the Coulomb
effects. We find that the pion HBT data from RHIC are fully compatible with the
single freeze-out scenario, pointing at the shape of the freeze-out
hypersurface where the transverse radius is decreasing with time. Results for
the single-particle spectra for this situation are also presented. Finally, we
present predictions for the kaon femtoscopy.
