chore: record journal

.trellis/workspace/dingkang/index.md

@@ -8,7 +8,7 @@
 
 <!-- @@@auto:current-status -->
 - **Active File**: `journal-1.md`
-- **Total Sessions**: 9
+- **Total Sessions**: 10
 - **Last Active**: 2026-08-03
 <!-- @@@/auto:current-status -->
 
@@ -19,7 +19,7 @@
 <!-- @@@auto:active-documents -->
 | File | Lines | Status |
 |------|-------|--------|
-| `journal-1.md` | ~196 | Active |
+| `journal-1.md` | ~217 | Active |
 <!-- @@@/auto:active-documents -->
 
 ---
@@ -29,6 +29,7 @@
 <!-- @@@auto:session-history -->
 | # | Date | Title | Commits | Branch |
 |---|------|-------|---------|--------|
+| 10 | 2026-08-03 | Reject low-poly scrub bush experiment | `e58a928` | `main` |
 | 9 | 2026-08-03 | Improve Cesium cruise smoothness | `0d2dc22` | `main` |
 | 8 | 2026-08-03 | Clean stale tuft density comment | `f569d45` | `main` |
 | 7 | 2026-08-03 | Add feature registry dispatch | `ff18217` | `main` |

.trellis/workspace/dingkang/journal-1.md

@@ -194,3 +194,24 @@ Reduced Cesium preview cruise stutter by lowering dense scrub bush nodes in nant
 ### Status
 
 [OK] **Completed**
+
+
+## Session 10: Reject low-poly scrub bush experiment
+
+**Date**: 2026-08-03
+**Task**: Reject low-poly scrub bush experiment
+**Branch**: `main`
+
+### Summary
+
+Tested user-supplied assets/models/custom/bush_low/bush_low.glb for nantaizi scrub edge bushes. Geometry dropped from 63,762 verts / 67,536 indices to 4,044 / 4,050 and GLB size dropped from 31.96 MB to 27.51 MB with 266 scrub bush nodes unchanged, but user validation found the visual effect unsatisfactory. Restored generate_scene.py to the original default bush asset, archived the task, and recorded the rejected experiment in changelog/spec without adding bush_low to git.
+
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `e58a928` | (see git log) |
+
+### Status
+
+[OK] **Completed**