Phase 0.5 — 30 renders via Blender + ImportLDraw (Cycles, 64 samples, ARM64 CPU)
| Part | Images | Avg bbox | Min bbox | Max bbox |
|---|---|---|---|---|
| 3070b | 10 | 26.8% | 16.7% | 37.9% |
| 3005 | 10 | 23.1% | 16.3% | 31.9% |
| 3749 | 10 | 10.5% | 6.0% | 14.7% |
10 renders | bbox area: avg 26.8% (min 16.7%, max 37.9%)
10 renders | bbox area: avg 23.1% (min 16.3%, max 31.9%)
10 renders | bbox area: avg 10.5% (min 6.0%, max 14.7%)