  With reference to spatially non-local nematic liquid crystals, we develop a
theory of optical spatial solitons and modulational instability in anisotropic
media with arbitrarily large birefringence. Asymmetric spatial profiles and
multivalued features are predicted for self-localized light versus walk-off
angle. The results hold valid for generic self-focusing birefringent media and
apply to large angle steering of individual and multiple self-trapped optical
beams.
