Retracting Platform

Joist option 3: no animation, a plain state swap. The full-width cross boards only exist in the deployed view; the "Stowed" button hides them outright and shows a separate, static set of wood blocks already sitting inside the metal shelf-frame cavities - two stacked in the driver-side cavity, one alone in the passenger-side cavity. Nothing folds, rotates, or slides between the two views; it's a direct swap, not a transition. Each wall carries a fixed support bracket - a rectangle of metal bar stock mounted on the wall face, spanning the full 84 in platform length. The bracket sits beneath the platform: its top rail is set at the deployed platform's resting height (the platform rests on the bar's highest point), and it runs straight down from there to the wall's bottom - the bottom of the bracket lines up with the bottom of the wall. Each bracket also has a true 3D shelf frame reaching out from the wall into the room: a top bar (the shelf itself, at the platform's resting height) and a bottom bar (matching the wall bracket's own bottom), connected by two vertical bars - one at the wall, one at the outer reach - so it's a real load path down to the floor, not just a flat decal on the wall face. The driver-side frame reaches into +X and the passenger-side frame reaches into −X (both toward the middle of the van), each reaching out 3× the panel thickness (matching the total thickness of the 3-panel stack when stowed). All four bars in the frame - shelf, bottom bar, and both verticals - share the same stock thickness as the wall bracket. On the driver wall this is a visual stand-in for whatever secures panel 1's hinge edge; on the passenger wall, the top rail is exactly where the platform's deployed outer long edge rests. Three wooden cross boards bridge from the driver bracket's top rail to the passenger bracket's top rail, spaced along the length, so the two internal hinges (which run the platform's full length) have support underneath at multiple points rather than sagging between the two end walls. Stowed view folds panel 1 up toward the roof side of the driver wall; panel 2 folds back opposite panel 1 at the near hinge, and panel 3 folds back opposite panel 2 at the far hinge - landing panel 3 folded up the same direction as panel 1, stacked flat against the wall. Carpet on P1 and P3 runs as two lengthwise strips along the long edges of a face, not a full covering. Panel 1 (the wall panel) has strips on both its top and bottom - it's sandwiched between the wall and panel 2 when stowed. Panel 3 now has strips on both its top (where it lands against panel 2) and its bottom. Panel 2's top is bare, but its bottom carries a single lengthwise strip down the center - its two long edges are bare wood there too, since those get slick tape instead (see below), so a center strip is the only anti-rattle option left on that face. Both of panel 2's long edges - where the two hinges attach, to panel 1 and to panel 3 - get a slick low-friction tape so the hinge knuckles pivot freely instead of the wood edges binding against each other. Each panel also has two recessed wing-screw mounts, at 1/3 and 2/3 of its length, down into the support posts below. Both side walls and the back doors are fixed reference planes for orientation - the platform mounts to the driver-side wall (left) and its deployed outer edge lands near the passenger-side wall (right); the back doors sit at the platform's rear short edge, opposite the bench/Bar end. None of the three are dimensioned components - they're not drawn to the van's actual wall height or door size. Clicking "Stowed" animates the fold over 4 seconds; "Deployed" returns over 1.5 seconds. The compass in the bottom-left corner rotates with the view (not the zoom) so it always shows current orientation: X (red) runs driver wall ↔ passenger wall, Y (green) points up toward the roof, Z (blue) runs bench/Bar end ↔ back doors. The viewport's Y-axis (left/right spin) rotation is locked at 180 degrees, so the view always looks straight down the Z axis, flipped to the opposite end from the default front-on view - dragging only tilts the camera up/down (X-axis), it never spins the model around; this keeps the fold mechanism, which all happens in the X-Y plane, presented edge-on and legible.