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lemurboy12, posted Wed Jan 15, 2020 7:58 pm (53257)

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https://www.dropbox.com/s/7w30gb4dr1thftl/foppc.7z?dl=0

LokiReborn, posted Fri Jan 17, 2020 5:13 am (53292)

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I don't work with image stuff much so I'm not sure on a few things but the basic structure is

long - Block length including itself
0x28 aka 40 bytes ascii file name
0x28 Description of file, examples plt files say Palette sp5 say sprite image, alf say alpha channel etc.
possibly another 0x28 block or start of file format
data

then repeat for each block in there.

Arranging the bytes from one of the alphas a bit it gives you this so it seems bytes by bytes alphas and not another compress format etc. hope it helps a bit.