A FloodFillSeed resolved to the voxel grid, carrying the voxel index the classification actually starts from.
Original world-space seed position.
Global voxel index used by the classification, or -1 when no voxel was found.
Explains why the seed was ignored or moved away from its original position.
A FloodFillSeed resolved to the voxel grid, carrying the voxel index the classification actually starts from.