Extract the stable authored load inputs used by both scene aggregation and
per-node material resolution. Vertex ordering is the tight D-space extent;
segment ordering is a conservative √2-large fallback; position_bounds
keeps width normalization available for unindexed nodes. Never substitute
the worker's projected bounds: the streaming path builds the material on an
empty placeholder mesh before those bounds exist.
Extract the stable authored load inputs used by both scene aggregation and per-node material resolution. Vertex ordering is the tight D-space extent; segment ordering is a conservative √2-large fallback;
position_boundskeeps width normalization available for unindexed nodes. Never substitute the worker's projected bounds: the streaming path builds the material on an empty placeholder mesh before those bounds exist.