  In this paper we study wall-crossing functors between categories of modules
over quantizations of symplectic resolutions. We prove that wall-crossing
functors through faces are perverse equivalences and use this to verify an
Etingof type conjecture for quantizations of Nakajima quiver varieties
associated to affine quivers. In the case when there is a Hamiltonian torus
action on the resolution with finitely many fixed points so that it makes sense
to speak about categories $\mathcal{O}$ over quantizations, we introduce new
standardly stratified structures on these categories $\mathcal{O}$ and relate
the wall-crossing functors to the Ringel duality functors associated to these
standardly stratified structures.
