Hacking ROM Hack Extracting textures from Mega Man Star Force

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I'm looking to edit the overworld and portrait sprites, but I can't figure out how to extract them properly.
I used SFArcTool (https://github.com/Prof9/SFArcTool) to extract the fieldobj.bin archive with this command:
Code:
sfarctool -i C:\Users\x\Documents\mmsfdump\data\datbin\com\fieldobj.bin -o C:\Users\x\Documents\mmsfTextures\mmsf -x -d
but I'm not sure what to do regarding the contents. I tried inputting some of them into crystaltile2, but it just results in messes like this:

1772528038742.png


I don't know if it's because of compression, and if it is, I don't know how to decompress it, as nothing I've tried has worked.
I stumbled upon this thread https://gbatemp.net/threads/how-can-i-extrac-images-from-a-rom.329789/ which looked helpful, and someone there was able to extract one of the overworld sprites from fieldobj.bin, but I'm lost on how to replicate it.
Is anyone able to help me with this?
 

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