its just zlib using offzip will extract it.
c:\offzip.exe -a c:\file.dat c:\etract 0x0

it is xmemcompress they just changed some values like the sliding window.

could be but forza was not compressed.

this format looks annoying
the file is zlib compressed sections and appears to store information about the extracted files in the original file table.
like the model structure and dds headers.
a custom program would be needed to read these as i do not know how to read zlib easily in max.

The contents of this post was deleted because of possible forum rules violation.

no sample file = no help

i posted this a while ago just do a search before posting
viewtopic.php?f=10&t=3433&p=31222&hilit=luna#p31222

those models are from runescape i found a model viewer for those http://www.moparscape.org/smf/index.php?topic=385295.0

http://cw.xoyo.com/ I made a quickbms script for these files. idstring "PACK" get files long get tableoff long get unko01 long get null long get nameoff long for i = 0 < files goto tableoff get check long get offset long get size long get zsize THREEBYTE get two byte savepos tableoff goto ...

post your 3d model you want to import and then weather you want to make a script for blender or 3ds max and someone can point you in the right direction.

animation is not supported iun this game use the -noanim flag in the command line

c:\umodel.exe -export -noanim c:\test.xxx

i would use a texture capturing program and capture the correct normal map image then just compare them to see what is going on.

looks like a standard xbox swizzled dds.
if you make a header for it you can use the sdk to unswizzle the image.

did you even attempt to find umodel?
just Google umodel results in his website being the 3rd in the list
if i google umodel unreal his site is the first one.

umodel supports models and textures from this game.