Continued indoor testing through 2026-05-20 surfaced a deep family
of physics + lighting bugs that span buildings AND dungeons. Today's
session shipped 5 surgical fixes (A4 + #89 + #90 + #91 + #92) that
close the user-visible "walls walk through at Holtburg inn" symptom,
but #90 specifically is a CLAUDE.md-rules workaround (sphere-overlap
stickiness on top of point-only cell containment) added without prior
approval. The underlying issue (BSP push-back distance probably
diverges from retail) hasn't been measured. Plus the umbrella #83
(indoor multi-Z walking) has been open since 2026-05-19 with multiple
aborted fix attempts; plus indoor lighting (#80 + #81 + new #93 +
#94) has been deferred as "M7 polish" but is actually part of the
same indoor-experience problem.
Promoting to a milestone of its own forces the work to be central,
retail-anchored, and complete — not another whack-a-mole patch.
Milestone M1.5 — "Indoor world feels right":
Demo: enter Holtburg Sewer through the in-town portal, navigate
through 5-7 rooms with stairs + a multi-Z chamber, exit back to
town. Walls block. Stairs work. Items block. Lighting reads
correctly. Cell transitions smooth.
Phases:
A6 — Indoor physics fidelity (cdb-driven)
A7 — Indoor lighting fidelity (RenderDoc + retail-decomp driven)
Issues in scope: #80, #81, #83, #88, #90 (workaround removal),
#93 (new lighting umbrella), #94 (held-item spotlight),
+ TryFindIndoorWalkablePlane synthesis removal.
M2 ("Kill a drudge") deferred until M1.5 lands.
This commit updates:
- docs/plans/2026-05-12-milestones.md (M1.5 block inserted, M2 moved
to deferred status)
- docs/plans/2026-04-11-roadmap.md (A6 + A7 sub-pieces detailed)
- CLAUDE.md (Currently working toward updated to M1.5, M2 paragraph
marked deferred, M1.5 baseline shipped paragraph added)
- docs/ISSUES.md (#80, #81, #83, #88, #90 tagged M1.5 scope;
new #93 indoor lighting umbrella + #94 held-item spotlight filed)
- docs/research/2026-05-21-open-items-pickup-prompt.md (landscape
table reorganized around M1.5 phases)
A6 + A7 specs to be drafted in the next session(s).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Phase A4 (multi-cell BSP iteration) ships in three commits (e6369e2,
493c5e5, 691493e — with revert 3add110 + reapply during visual
verification that proved A4 is not the cause of the issue surfaced).
1139 + 8 baseline maintained. 10 new unit tests pass. Wires retail's
CTransition::check_other_cells (acclient_2013_pseudo_c.txt:272717-272798)
into Transition.FindEnvCollisions.
Visual verification at the Holtburg inn vestibule surfaced a separate,
pre-existing M2 blocker (filed as #90): CellId ping-pongs between
outdoor 0xA9B40022 and indoor 0xA9B40164 on every wall push-back
because the push-back exits the indoor CellBSP volume, causing the
resolver to flip back to outdoor and bypass walls on outdoor ticks.
Indoor BSP results (Collided/Adjusted/Slid all firing) prove walls ARE
detected when the player is indoor; the aggregate "walls walk through"
appearance comes from CellId classification instability, not from
collision detection.
Bug reproduces fully with A4 reverted (launch-revert2.log captured 18
cell-id flips between 0xA9B40022 ↔ 0xA9B40164, 11 inside=True
building-transit events, 61 indoor-bsp queries firing the full
result distribution). A4 is correct and tested but dormant in
practice until #90 is fixed.
Updates:
- docs/research/2026-05-20-phase-a4-shipped-cell-pingpong-finding.md (new)
- docs/plans/2026-04-11-roadmap.md (A4 shipped row added)
- CLAUDE.md (Indoor walking Phase A4 paragraph + next-step pointer
to #90 with retail oracle anchor at acclient_2013_pseudo_c.txt:308742-308783)
- docs/ISSUES.md (#90 filed, HIGH severity, M2-blocker)
- docs/research/2026-05-21-open-items-pickup-prompt.md (landscape
table updated — A4 closed, #90 promoted to top blocker)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
After the 2026-05-21 session merged A1/A1.5/A1.6/A1.7 to main, six
discrete items remain. This doc maps them as a landscape rather than
single-phase:
- Collision (M2 critical path): A4 multi-cell BSP iteration → verify
stairs → A2 PHSP inversion → A3 synthesis removal
- Rendering (M7 polish): indoor lighting + spotlight-projection bugs
The recommended order is A4 first (biggest user payoff, unblocks A3),
then stairs verification, A2 + A3 paired, lighting in a separate
session. A3 must NOT ship before A4 — that's the Bug A regression
from 2026-05-20.
Includes a pasteable session-start prompt that the user can box into
a fresh Claude Code session.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
