# PAct OT Router Variants QA

Date: 2026-05-21

All three additional true OT-router inference variants passed the export QA on the fixed 3-sample set.

| variant | patched blocks | QA | spconv mesh warnings | note |
|---|---:|---:|---:|---|
| Stage1 RGB Edge | 1 | 3/3 | 0 | first block, mask beta 0.2, RGB edge lambda 0.4 |
| Stage1 Virtual Patch | 1 | 3/3 | 1 | first block, mask beta 0.2, RGB edge lambda 0.4, virtual mass 0.05 |
| Stage1 First-Third Edge | 8 | 3/3 | 2 | first-third blocks, mask beta 0.2, mask edge lambda 0.4 |

Current reading:
- RGB edge is stable and exportable, but does not fix the refrigerator drawer label issue.
- Virtual patch is the best current candidate because it keeps QA pass rate at 1.0 and recovers one drawer label on the refrigerator sample.
- First-third edge is useful as a feasibility check for deeper injection, but it makes the sparse structure denser and triggers more spconv fallback warnings.