thejayman77
ba74bbd5aa
Per-vertex GS fog end-to-end (gs_stub emit incl. persp_emit5, gs_prim_list_feeder XYZ2->XYZF2 on PRIM.FGE, gs_make_sh3_scheduler_fixture.py F/FGE packing), new fog TBs, fidelity attribution tooling. Functional baseline before removing the dead bilinear lerp8 clamps (Codex: 161-node comb loop -> -0.042ns setup fail). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
35 lines
1.3 KiB
Markdown
35 lines
1.3 KiB
Markdown
# Ch425 — post-process bisection closeout
|
|
|
|
## Objective
|
|
|
|
Append the captured post-process families to the accepted Ch424 scene and
|
|
admit them only if the production replay stays exact and the PCSX2 fidelity
|
|
score improves.
|
|
|
|
## Candidates and isolation
|
|
|
|
`zsrt139f20` concatenated the 125-epoch Ch424 scene, the 20-epoch PSMCT32
|
|
darken pass, the 212-epoch Ch405 PSMT8 alpha-fan fixture, and the 18-epoch
|
|
PSMT4 pass. The 375-epoch production replay was functionally clean but its
|
|
frame was catastrophically white (mapped MAE 165.23 / RMSE 189.17), so it was
|
|
not deployed.
|
|
|
|
Epoch-boundary replays isolated each family:
|
|
|
|
- Ch424 + CT32 darken: mapped MAE 21.3646 / RMSE 30.1358, worse than the
|
|
Ch424 baseline 20.9469 / 29.7626.
|
|
- Ch424 + CT32 + old alpha fans: mapped MAE 161.9749 / RMSE 185.4484; this is
|
|
the white-frame source.
|
|
- Ch424 + PSMT4 only (`zsrt139f21`): mapped MAE 23.4472 / RMSE 32.3453 and
|
|
most scene detail was erased.
|
|
|
|
Every isolation replay had zero fragment drops and exact RTL Z/color
|
|
scoreboards. The problem was therefore captured-state interpretation, not
|
|
timing, loss, or board nondeterminism. Ch425 rejected all three fixtures as
|
|
generated and left the live board on Ch424 while the alpha source was audited.
|
|
|
|
## Status
|
|
|
|
Closed as a diagnostic chapter. Ch426 supersedes the alpha result after
|
|
repairing the fixture's RGBAQ alpha packing.
|