ReadonlyedgeReadonlyinstanceOptional ReadonlysharesTrue when a batch decoded earlier already charges these vertices. Material groups of one prototype share its vertex pool, so only the batch that owns the pool pays for it -- and the renderer allocates no second buffer, so a sharing batch adds nothing, not even an empty buffer's four bytes.
ReadonlysurfaceReadonlysurface
Batch payload sizes, which accessor counts already determine before a decode.