Dopita, S. Kwok and R.S. Sutherland, eds. Di raction-limited speckle interferometry and modeling of the circumstellar envelope of R CrB at maximum and minimum light K. Ohnaka, T. Blocker, K.-H. Hofmann, N. R. Ikhsanov, G. Weigelt Max-Planck-Institut fur Radioastronomie, 53121 Bonn, Germany Y. Balega Special Astrophysical Observatory, Nizhnij Arkhyz, 35147, Russia V. I. Shenavrin, B. F. Yudin Sternberg Astronomical Institute, 119899 Moscow, Russia ...

... We find a transition of LBV star from the LBV instability strip to the region of classical WN for the first time. ... Numerical modeling of the atmospheres of these objects are very important for understanding the evolutionary relationship WR and LBV stars, as well as of the physical causes of LBVs variability. We studied spectra of two very luminous stars in the M33 galaxy - LBV V532 and late WN star FSZ35. ... Bottom: The spectrum of FSZ35 with the final model . ...