Make sure you save the file then open version 5 of Pack3d and open the file.
click on the left window and find address 80 as marked in yellow.
This is the start of this block of data.
select the numbers marked in blue and notice the data inspecter
We're looking at chunks now.
All chunks are like this:
01 00 00 00 = 1 ChunkType 4 bytes
65 00 00 00 = 100 Chunk Subtype/Version 4 bytes
CB 28 00 00 = 10443 chunk_size long (4 bytes) = Data (chunk_sizebytes)
The data chunk size is the same type info we changed in the header,
just telling us how big this block of data is.
RED is the ID the game engine uses to work with this block
which, in this case, is the actual 3d object of the mine.
All ID's are 8 bytes long.