# Journal - dingkang (Part 1) > AI development session journal > Started: 2026-08-03 --- ## Session 1: Initialize Trellis project guidelines **Date**: 2026-08-03 **Task**: Initialize Trellis project guidelines **Branch**: `main` ### Summary Initialized Trellis project scaffolding and replaced the incorrect frontend spec templates with project-specific pipeline, Blender, preview, config, and cross-layer guidance. Verified spec layers, placeholder cleanup, key-contract coverage, and Blender pure Python tests. ### Git Commits | Hash | Message | |------|---------| | `4c5981c` | (see git log) | ### Status [OK] **Completed** ## Session 2: Refactor Cesium material export contract **Date**: 2026-08-03 **Task**: Refactor Cesium material export contract **Branch**: `main` ### Summary Moved Cesium material export overrides into catalog-backed material contracts saved as Blender material custom properties. Kept legacy name-table fallback for old .blend files, updated Blender/spec guidance, and verified with unit tests, py_compile, diff check, and parity before/after comparison showing only expected cesium_export blend property diffs. ### Git Commits | Hash | Message | |------|---------| | `0635c09` | (see git log) | ### Status [OK] **Completed** ## Session 3: Archive osmassets refactor plan **Date**: 2026-08-03 **Task**: Archive osmassets refactor plan **Branch**: `main` ### Summary Moved durable conclusions from the temporary osmassets refactor plan into changelog and Trellis specs, removed docs/refactor-plan.md, and verified no live docs/spec references to the deleted plan remain. ### Git Commits | Hash | Message | |------|---------| | `6882921` | (see git log) | ### Status [OK] **Completed** ## Session 4: Extract fountain module **Date**: 2026-08-03 **Task**: Extract fountain module **Branch**: `main` ### Summary Moved fountain assembly from generate_scene.py into blender/osmassets/fountain.py, updated P2 refactor docs, and verified py_compile, 51 pure tests, and Blender/Cesium parity before/after with identical snapshots. ### Git Commits | Hash | Message | |------|---------| | `6271055` | (see git log) | ### Status [OK] **Completed** ## Session 5: Extract building module **Date**: 2026-08-03 **Task**: Extract building module **Branch**: `main` ### Summary Moved building assembly from generate_scene.py into blender/osmassets/building.py, updated P2 refactor docs so only roads remains in generate_scene.py, and verified py_compile, 51 pure tests, and Blender/Cesium parity before/after with identical snapshots. ### Git Commits | Hash | Message | |------|---------| | `032922a` | (see git log) | ### Status [OK] **Completed** ## Session 6: Extract road assembly module **Date**: 2026-08-03 **Task**: Extract road assembly module **Branch**: `main` ### Summary Moved Blender road GeoJSON assembly and OSM fallback roads into blender/osmassets/roads.py while preserving road_counts, Layer catalog warnings, scene metadata, and SCENE_DONE output. Verified py_compile, unittest, task validation, and Blender/Cesium parity before/after as identical for both sample areas. ### Git Commits | Hash | Message | |------|---------| | `0f3c1ee` | (see git log) | ### Status [OK] **Completed** ## Session 7: Add feature registry dispatch **Date**: 2026-08-03 **Task**: Add feature registry dispatch **Branch**: `main` ### Summary Introduced blender/osmassets/features.py with FeatureHandler and dispatch_ways for ordered OSM way feature dispatch. Converted generate_scene.py water/grass/scrub/tree_row/building branches into registry handlers while keeping material order, counts, road warning behavior, scene metadata, and SCENE_DONE unchanged. Verified py_compile, unittest, task validation, and Blender/Cesium parity before/after as identical for both sample areas. ### Git Commits | Hash | Message | |------|---------| | `ff18217` | (see git log) | ### Status [OK] **Completed** ## Session 8: Clean stale tuft density comment **Date**: 2026-08-03 **Task**: Clean stale tuft density comment **Branch**: `main` ### Summary Cleared stale D3 tuft_density_wave comment debt and updated parity guide known-defect records without changing executable scene generation logic. Verified py_compile, 51 pure tests, and task validation. ### Git Commits | Hash | Message | |------|---------| | `f569d45` | (see git log) | ### Status [OK] **Completed** ## Session 9: Improve Cesium cruise smoothness **Date**: 2026-08-03 **Task**: Improve Cesium cruise smoothness **Branch**: `main` ### Summary Reduced Cesium preview cruise stutter by lowering dense scrub bush nodes in nantaizi from 707 to 266, preserving scrub ground cover, and trimming preview route/follow hot-path overhead without lowering default visual clarity. Verified nantaizi blender/cesium/preview rebuild, node --check, py_compile, 51 pure tests, and task validation. ### Git Commits | Hash | Message | |------|---------| | `0d2dc22` | (see git log) | ### 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** ## Session 11: Adopt Shapespark vegetation **Date**: 2026-08-03 **Task**: Adopt Shapespark vegetation **Branch**: `main` ### Summary Adopted split Shapespark low-poly plants for nantaizi trees, scrub bushes, and lawn tufts; toned Cesium foliage export, removed retired vegetation assets/loaders, validated nantaizi blender/cesium/preview. ### Git Commits | Hash | Message | |------|---------| | `dbb5705` | (see git log) | ### Status [OK] **Completed** ## Session 12: Optional GLB compression stage **Date**: 2026-08-03 **Task**: Optional GLB compression stage **Branch**: `main` ### Summary Added an explicit compress stage and GLB compression script for nantaizi WebP review artifacts without replacing the baseline GLB. ### Git Commits | Hash | Message | |------|---------| | `7ba8594` | (see git log) | ### Status [OK] **Completed** ## Session 13: Fix OSM multipolygon buildings **Date**: 2026-08-03 **Task**: Fix OSM multipolygon buildings **Branch**: `main` ### Summary Parsed building multipolygon relations, generated building holes, and respected explicit OSM height for nantaizi relation -65. ### Git Commits | Hash | Message | |------|---------| | `95f8458` | (see git log) | ### Status [OK] **Completed**