yes the algo is almost identical.. when I wrote the hashing module for hashbag (prior to their release of a hashing module) I noticed that it's technically the same thing with different algo names (and another algo added). i've never seen 80 bytes of an algo and 64 bytes of the others before Denarius, and then this week all the sudden comes 'SkunkHash + Raptor' where it is 80 bytes of one algo + 64 bytes of 3 other algos, and i have been wondering what Raptor is as I never added it to any hashing module however the blocks are accepted by the network just using the 4 algos: 80b skein, 64b cubehash fugue gost, no need for anything else

thats why i went to look in his own hashing module once he released it but it looks like a pretty close copy of ex_mac's hashing modules.. eg
https://github.com/signatumd/hashing-module/blob/master/skunkhashmodule.c
https://github.com/exmac/tribus-hash/blob/master/tribusmodule.c
only difference is where it says 'tribus' in the skunkhash it says 'skunkhash'

in the skunkhash.c hashing module:
https://github.com/signatumd/hashing-module/blob/master/skunkhash.c
https://github.com/exmac/tribus-hash/blob/master/tribus.c
only difference is that the hash functions used are different (however the first hash is still 80 bytes) and also the init calls are removed (they dont really do anything other than create the variables but you are supposed to use them for some fussy compilers) and they don't use constants for the hashes (again a thing you are supposed to do for max compiler support) and there is a fourth algo added at the end there, otherwise the functionality is identical to the tribus hashing module

and nowhere does it say raptor anywhere, so thats why I wonder what the hell this raptor algo is? searched on the net and didn't find anything about raptor algo