Campaign OVERHAUL S3 chunk 4 (docs/research/2026-09-01-overhaul/s3-walk-ownership-map.md §10). Retail
polygon-clips exactly three things on the CPU — portal polygons (PView::GetClip), punch fans
(DrawPortalPolyInternal against building_view), and exit seals (setup_view + polyClipFinish);
ordinary meshes, cell shells, terrain, particles and the weather are never view-clipped. Every
acdream-only clip rule beyond those three is deleted; the two that remain get a new CPU/GPU
equivalence pin.
DELETED (no retail counterpart):
- RetailPViewRenderer.DrawLandscapeDynamicsPhase's per-outside-view-slice weather loop
(SetTerrainClip + ClearClipRouting + the old DrawLandscapeSliceLate leaf, one call per active
landscape view) — retail's GameSky::Draw(sky,1) @0x00506ff0 runs ONCE, unclipped, after
LScape::draw's whole block loop. RetailPViewPassExecutor.DrawWeatherOnce stays the one call site;
it now also submits the rain particles (ParticleRenderPass.SkyPostScene) as ONE unclipped
submission, folded in from the deleted loop's per-slice clipSlot draw.
- RetailPViewPassExecutor.DrawLandscapeSliceLate, RetailPViewLandscapeLateSliceContext,
SetTerrainClip (the walk-level wrapper — its only caller was the deleted loop),
ClearClipRouting (same), SetCellShellClipRouting (already had no caller), and
UseIndoorMembershipOnlyRouting (4 call sites in RetailPViewRenderer.cs) — all "first view clips
the shell" residue: SetCellShellClipRouting was the ONLY place EnvCellRenderer.SetClipRouting
ever received a non-null value anywhere in the app, so once it's gone,
UseIndoorMembershipOnlyRouting's own clear calls are provably permanent no-ops. AbortFrame's
matching TryAbort(SetClipRouting(null))/TryAbort(ClearClipRouting) lines are dropped for the
same reason. KEPT: BeginDoorwayScissor, _surface.BindTerrainClip(), EnableClipDistances/
DisableClipDistances, and IWorldPassSurface.SetTerrainClip/ClipFrame.SetTerrainClip/
PrepareClipFrame's terrain-clip publish — all still have real consumers (DrawWalkSky's per-slice
outdoor sky mesh draw; the always-bound TerrainClip UBO section) or are shared classic (non-walk)
infrastructure out of this chunk's ownership (WorldScenePassExecutor, PortalTunnelPresentation).
- WbDrawDispatcher.WalkClassify.ResolvePartClipSlots (renamed ResolvePartVisible, returns bool) and
RetailWholeMeshSlot: the per-view clip-slot LIST always collapsed to either nothing or one
element (RenderDeviceD3D::DrawMesh @0x005A0860 submits the whole mesh once any view admits it) —
never anything but a Boolean wearing a list-shaped costume. IWalkLookInViewSource.
VisibleClipSlotsInLookInTurn is deleted outright (no consumer besides that collapse);
SphereVisibleInLookInTurn gained VisibleClipSlotsInLookInTurn's own testSphere parameter so the
no-authored-sphere case ("any admitted view, geometry ignored") still has a home.
EmitClassifiedBatches now emits exactly one batch per surviving TryClassifyBatch using the
entity's own classic slot (always 0 while _clipRoutingActive is never armed by the walk path).
- The six ProbeCathedralSkip*/ProbeCathedralShellOrderEnabled discriminators (RenderingDiagnostics,
their six docs/launch-options.md rows, every read site in WalkFrameDriver/
RetailPViewPassExecutor.WalkLeaf/RetailPViewRenderer, and the WalkFrameDriver.
TraceCathedralShellOrder method + RetailPViewRenderer._probeCathedralShellOrderFrame it served) —
the investigation is closed: the cathedral leak is retail behavior, not an acdream defect to
discriminate.
O1-O4 (the ledger's carried chunk-1 items, closed here because this chunk owns the weather path):
IWalkEventSink gains OnWeatherTurn(viewerCellId), fired by RetailFrameWalk.DrawLandscape
UNCONDITIONALLY at retail's own call-site shape (GameSky::Draw(sky,1) is itself unconditional from
LScape::draw; the is_player_outside gate lives inside it) but gated by the walk context's own new
WeatherGateOpen/ViewerCellId members (default false/0, so every other IRetailFrameWalkContext
implementer — test fixtures, the FW1 conformance replay context — is unaffected).
WalkProductionFrameContext wires RetailPViewFrameInput.ViewerCellId and
RetailPViewPassExecutor.ShouldDrawWeatherOnce(RenderSky, RenderWeather, PlayerCellId) into those two
members. WalkFrameDriver.OnWeatherTurn prints the "OC" transcript line at COLLECT time; the print is
removed from DrawWeatherOnce (the DRAW stays there, at Replay). Because DrawLandscape's new call sits
at the very end of the method, an outdoor root's transcript naturally ends with the line and an
interior root's lands strictly between "LS" and the flood's first "EC" — exactly retail's position —
with no extra plumbing.
Kept items each get a synthetic-view CPU/GPU equivalence pin (ClipFrameLayoutTests): exit seals via
the real ClipFrame.AppendSlot/GetSlotPlanes round trip, punch fans via the direct
ClipViewSlice.Planes = cps.PlaneArray assignment ClipFrameAssembler.Assemble uses — both assert every
polygon edge midpoint has ~0 signed distance under the GPU-read-back planes and non-negative distance
under every plane.
Every new pin's mutation was hand-verified this session (temporarily reintroduced, confirmed the
exact failing assertion, then reverted): a duplicated OnWeatherTurn call fails Assert.Single with
"2 matching items" on both the outdoor and interior position tests; suppressing the Collect-time
call fails the same assertions with "did not contain any matching items"; perturbing one GPU plane's
offset by 0.05 fails the exit-seal equivalence pin with "the closest plane was only 0.050000012
away". WalkProductionFrameContextTests pins that the ViewerCellId/WeatherGateOpen storage seam
itself never drops or swaps its own two constructor/Reset arguments.
No register row added or removed — every change here deletes an acdream-only rule; none introduces
a new deviation. Full solution build: 0 warnings/0 errors. App hermetic 6,829/6,829 (was 6,828 base
+ 1 new pin). InstalledDat 244 pass/1 skip/4 known (2x #383, TowerAscent, and the pre-existing #458
WalkLandscape.CheckBlocks block-visibility divergence — unrelated to this chunk, untouched by it).
Core.Tests Rendering 216/216.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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