Day to dusk is the trade name for converting an ordinary daylight exterior shot into a twilight one: a deep blue sky, warm light spilling out of the windows, the porch and path lit, and the house reading as somewhere you would want to arrive at the end of a day. It is the shot most agents want at the top of a listing, and it is the shot that is hardest to schedule, because real blue hour is a narrow window that moves every day and disappears entirely if the weather turns.
Traditionally you had two options. Book the photographer for a second visit at dusk, which costs another call-out fee and depends on the sky cooperating. Or send the daytime file to an editing service, wait a day or two, and pay per image. Both are fine. Both also mean the listing goes live without its best photograph, or goes live late.
The AI route changes the economics rather than the craft. You upload the daylight frame, choose how the sky and the lights should read, and get the twilight version back before the listing description is finished. The building, the roofline, the windows and the planting stay exactly where they were โ the model changes the time of day, not the property.