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About
Snippet
Although
reflection
mapping
can
be
used
to
produce
a
number
of
useful
effects,
it
provides
only
an
approximation
to
the
correct
reflection
information.
By
taking
into
account
just
the
surface's
reflection
direction
and
not
its
position
in
the
sphere,
it
models
an
infinitely
large
environment
sphere.
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