Unusual image format?

[blashy101]

Hello, I was attempting to start work on a fan translation of Puppet Tale and I'm going through and converting .cel files no problem, and I encounter some files with the extension .tex, I look at them in HxD and realize that they're also just .cel files with a bit of extra data in the header, after removing it they convert to .png no problem, but one of them converts to 17 png files and I'm not sure how to go about packing that back together? If it's at all possible of course.

3it won't convert this file unless you remove data from 0-A3 so the file starts with the usual 43 43 42 20 header like a normal .cel file.

Any thoughts? I've uploaded it in a zip file if anyone is willing to take a look.

Thanks.
NAGMENU.zip

[trapexit]

I'm happy to add support for the file format but at the moment I'm busy trying to finish up another project of mine.

3it doesn't currently have the ability to place files back together like you'll need. That said the files are literally just concatenated together which is why 3it can convert them all. But that mato chunk is probably some sort of lookup table. With sizes and offsets or something. I would have to look into it more. What that would mean is you likely can't just concat the file data back together and add that header back unless everything matches up.

I can take a moment over the next couple days and see if I can figure out what that "mato" chunk holds and it might be something I can quickly throw together.

[blashy101]

I appreciate you greatly for not only this but also the response, thank you so much. I'm working on other projects as well so no rush at all.

[blashy101]

Hey so I did a little independent research, not sure why I didn't just do this before and yes it's absolutely some sort of table of contents:

0x001C-23 two empty bytes, 00 00 -> 00 A4 (starting offset of first .cel file) -> 00 00 -> 28 EC file size

I hope this provides some insight although I'm sure you could figure it out quite quickly as well.