And yes, hierarchy is retained in .b3d format.
If you look at the .b3d file spec here:
http://www.blitzbasic.com/sdkspecs/sdkspecs/b3dfile_specs.txt
There is an example down the bottom showing how it's structured. Obviously what you see with countchildren depends on how you created the model and what you exported it with / from.
Typically you will have the scene root, then below that your mesh(es).
If you look at the .b3d file spec here:
http://www.blitzbasic.com/sdkspecs/sdkspecs/b3dfile_specs.txt
There is an example down the bottom showing how it's structured. Obviously what you see with countchildren depends on how you created the model and what you exported it with / from.
Typically you will have the scene root, then below that your mesh(es).