Hartmut
c1e1184c51
docs: record remaining USD architecture decisions (questions 2-4)
- Q2: seam/sharp encoding → index-space primvars (not world-space KD-tree)
- Q3: preview GLB → co-author from tessellation pass (not USD->GLB round-trip)
- Q4: layer strategy → Option B (canonical + override layer), flatten via
UsdUtils.FlattenLayerStack() to preserve instanceable prims for future
bearing ball instancing optimization
All 5 open questions now decided. Priority 2 coding can start after Priority 1.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>