Interiors defeat a single exposure. A camera can hold roughly ten to twelve stops of light; a living room with an open window on a bright day spans closer to sixteen. Expose for the room and the window becomes a white rectangle. Expose for the view and the sofa disappears into shadow. Bracketing solves it by taking the same frame several times at different exposures, then merging the usable parts of each.
A standard set is three frames — two stops under, metered, two stops over — though difficult rooms benefit from five. The camera must not move between frames, so a tripod or a very steady surface matters more than the lens. Most mirrorless and DSLR bodies have auto exposure bracketing in the drive menu; newer phones can shoot bracketed sets through their pro or RAW mode.
The merge itself decides whether the result looks professional or looks like 2010 HDR. The failure mode everyone recognises is halos around window frames, grey skies turned electric, and a flat, cartoonish tone curve where nothing has shadow. Good merging keeps the contrast that makes a room read three-dimensional, holds the view through the glass, and leaves the whites neutral rather than tinted.
The reason a room looks expensive in a brochure is that you can see the garden through the glass while the interior is still properly lit. Merging recovers that view from the darker frames and blends it back without a visible edge around the window frame — the detail buyers use to judge aspect, light and outlook.
Handheld brackets drift by a few pixels, and anything that moved between frames — a curtain, a tree outside, a ceiling fan — leaves a ghost. Frames are aligned before merging and moving areas are resolved from a single exposure, so you can shoot brackets handheld when there is no room for a tripod.
Output is tuned toward what a well-lit room actually looks like: neutral whites, shadows that stay dark enough to give shape, no halo line where bright meets dark. Agents forward these to sellers without anyone asking why the photos look strange, which is the real test.
Upload your frames and compare the merged result against your usual single exposure before you commit to anything.