completely eliminate all 90 degree ceiling intersections above the stair transform the stair wall and ceiling into one continuous carved plaster volume the curved stair guard must extend upward and flow seamlessly into the ceiling dissolving the existing triangular ceiling plane remove all sharp corners and linear ceiling edges in the stair zone replace the angular ceiling geometry with a smooth continuous elliptical vault that feels sculpted from a single mass the ceiling above the stair should read as carved away not framed no visible intersection lines between wall and ceiling the plaster form should wrap upward and across the ceiling in one uninterrupted sweep exaggerate the curvature so the transition feels bold and architectural not subtle maintain the rest of the room unchanged
