i am not sure what i see there on the screenshots? do you mean that if a model gets out of the view frustum its stencil shadows disappear even if they still are supposed to be visible?

i don't use stencil shadows. they have other problems too not only that one. for static shadows on models i use my plugin and in the future i will use realtime shadow mapping. (i already have a working pssm implementation. it just needs some improvements like filtering.)