  We re-examine quantization via branes with the goal of understanding its
relation to geometric quantization. If a symplectic manifold $M$ can be
quantized in geometric quantization using a polarization ${\mathcal P}$, and in
brane quantization using a complexification $Y$, then the two quantizations
agree if ${\mathcal P}$ can be analytically continued to a holomorphic
polarization of $Y$. We also show, roughly, that the automorphism group of $M$
that is realized as a group of symmetries in brane quantization of $M$ is the
group of symplectomorphisms of $M$ that can be analytically continued to
holomorphic symplectomorphisms of $Y$. We describe from the point of view of
brane quantization several examples in which geometric quantization with
different polarizations gives equivalent results.
