Begin from this original corridor illustration. The ochre pillar, coral inset and teal plinth remain stationary and rigid. Make a small smooth camera retreat along the current viewing direction while adjusting the framing in the opposite sense so the pillar keeps approximately its opening image height. Let the visible corridor frame spacing and depth relationship change around that retained foreground size. Preserve the three existing frames, floor connections and plinth contact. Do not simply scale the whole picture, move the pillar, orbit, cut, stretch the walls or reveal a new room. Stop both camera and framing change together and hold the same target. This is a qualitative visual brief, not numerical lens control.
