Write captions for a before/after transformation gallery

We're publishing a kitchen remodel gallery with four before/after pairs. Each pair
is displayed side by side on the page.

Pair 3 is the one that needs care: the "before" photo was shot straight-on from
the doorway, but the "after" photo was shot from an angled corner because the
straight-on spot is now blocked by a new island. The angle change makes the space
look bigger than the layout change alone accounts for.

[replace with your own project and describe each before/after pair]

Write:
1. A caption pattern for each pair that makes it unambiguous which image is
   "before" and which is "after," for a screen reader user who can't rely on
   left-right visual position the way a sighted user would.
2. For pair 3 specifically, a caption that's honest about the angle change (e.g.,
   noting the shot was taken from a different position) rather than implying a
   direct like-for-like comparison, since a customer could reasonably feel misled
   if the apparent size gain is partly a camera-angle trick.
3. A short note on whether these four pairs need individual alt text in addition
   to the visible captions, given the images already sit inside a labeled
   "before/after" gallery section.