The records carry a merged mesh's identity: the original index is the
source mesh's triangle, the padding word the source instance, flags
bit 1 is set for a mirrored source, and flags bits 16-31 hold the
source's material + 1. Without it, every record's padding
must be 0 (as every builder writes it).
The records carry a merged mesh's identity: the original index is the source mesh's triangle, the padding word the source instance, flags bit 1 is set for a mirrored source, and flags bits 16-31 hold the source's material + 1. Without it, every record's padding must be 0 (as every builder writes it).