ADR 0122 — Deep rooms without a ceiling
Status: accepted · Date: 2026-11-09
Continues ADR 0121: with camera and LOD at hand, room proportions are corrected.
Context
Section titled “Context”Rooms were much wider than deep. Cabinet rows and side shelves stayed close and the back was unused. The ceiling did not help either: it closed the upper area, darkened the scene and added no architectural reading.
Cabinets were in front instead of occupying the back wall, their natural place.
Decision
Section titled “Decision”1. No ceiling
Section titled “1. No ceiling”The room opens upwards. Side and back walls still close the scene; the ceiling disappears. The back sign and side light strips remain.
An open room lets geometry breathe and avoids the camera hitting a lid that adds no information.
2. Proportional depth
Section titled “2. Proportional depth”Depth is derived from width:
- at least 65 % of the width;
- with an absolute minimum of 20 units;
- leaving room behind cabinets and in front of shelves.
The room stops being a low display case and gets closer to a square plan. The camera still frames width, but perspective gains depth.
3. Cabinets against the back
Section titled “3. Cabinets against the back”The cabinet grid is anchored to the back wall:
- the back of the last cabinet keeps a small margin from the wall;
- extra rows grow towards the camera;
- the side shelf stays at the front.
The route is: shelf at the entrance, central aisle, cabinets at the back.
4. No model changes
Section titled “4. No model changes”Everything derives from the RenderModel and current focus. There are no new lenses, .codarch/ is
untouched and the checksum does not change. It works the same on code and documents/config maps.
Consequences
Section titled “Consequences”- The room has more travel and depth is felt when orbiting.
- The open top gives more air and less dark surface.
- Cabinets occupy the back and shelves the front; spatial hierarchy is clear.
- In rooms with many sheets, the front shelf may hide part of the back; camera and LOD remain the way to inspect it.
- The empty floor between shelf and cabinets calls for fine distribution in a next pass.
Discarded alternatives
Section titled “Discarded alternatives”- Keeping the ceiling. It closes the view and adds no reading.
- Only increasing width. It worsens the display-case proportion.
- Leaving cabinets in front. It wastes the back wall and leaves the rear empty.
- Filling the back with more shelves. It duplicates file reading and complicates labels.
Roadmap
Section titled “Roadmap”Phase M77 · The front-facing Atlas.
- ✅ Room without a ceiling.
- ✅ Depth proportional to width.
- ✅ Cabinets against the back wall.
- 🟡 Fine aisle distribution and angle LOD.
- ⬜ The animated entrance door, if decided.
- ⬜ The full editor.
The record of what is done lives in the guide feed.