Batch sequence number (1-indexed)
Base64-encoded Parquet data
Optionalindex_Companion of vertex_base, in indices (three per triangle).
Number of meshes in this batch
Optionalvertex_Cross-batch streams only (stream_shapes=cross-batch, #5407): where this
batch's vertex rows start in the whole stream. Its mesh rows may point
below it, at a shape an earlier batch carried. Absent on a batch that
decodes on its own.
Batch of geometry data as Parquet.