This is another image format, like WPM Image that has not been seen in use, however this one appears only in the CatSystem2 assembly, instead of in a CatSystem2 toolset application.

Speculation on this format, is in part, based on the PS Vita CatSystem2 formats: CZ0, CZ1, and CZ2.

These have not fully been looked into yet, but it likely follows a similar format to Kiss Color Files, these also share the extension of .cnf which is another yet-to-be documented format. Due to their presence in Nekopara Vol.3, its likely that these revolve around cel-shaded animated characters.

🚧 This page is a work in progress

Assumptions on the file format are

File Structure

Data Type	Value	Description
char[4]	"KCF"	File Signature
uint16	Width	Width of the image
uint16	Height	Height of the image
int16	BitDepth	Bits per pixel, probably
int16	Unknown0	Unknown 2-byte value 0
char[4]	"KCLZ"	LZH Compression (?) Signature, probably
uint32	Unknown1	Unknown 4-byte value 1
uint32	Length	Unknown Length added to start of KCZL structure
uint32	Unknown3	Unknown 4-byte value 3
uint32	Unknown4	Unknown 4-byte value 4
uint32	OffsetData1	Unknown offset to byte array
uint32	OffsetData2	Unknown offset to uint16 array
...	...