The number of 32 bit words of the voxel masks of the blocks.
The number of voxels along each axis of a block of the octree.
The number of nodes of the octree, a 32 bit word each.
The depth of the octree.
The version of the voxel format.
The size of a voxel, in world units.
The bounds of the voxel grid, in the space of the voxels.