- Vertical oblique projection: the floor matrix is the identity and a height
rises straight up by z·sin 20°, so the on-screen wall height is unchanged
and the cos 20° foreshortening of the plan, decor and anchors is gone.
- Device tiles and lock badges stand on the wall-top plane with one common
shift; the #651 placement search no longer runs in the live scene (its
removal is #714). Room names keep their Flat floor point.
- The 2.5D fit no longer reserves the 48 CSS px nudge budget.
- Switching projection keeps the camera when the previous projection was on
screen: saving the setting, entering an editor from 2.5D and adopting a warm
memo from the other projection re-read only the scalar zoom. A cold 2.5D
start still opens the 2.5D home.
- Opening faces are ordered along the oblique projector (s·y + z).
Witness: demo/smoke_iso_flat_parity.mjs (AC2–AC5, AC11) is red on the old code.
Issue: #713
User-Visible: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd
Claude