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PostPosted: Sat Jan 13, 2018 3:56 am 
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Joined: Sun Dec 27, 2015 10:22 pm
Posts: 119
Hey guys, I don't know who can help me (most likely Acewell can get me started, I don't really know xD), but I'm interested in learning how to reverse 2-d image formats. Does anyone have any pointers on where I can start learning how to/examples to trace of how it's done? I have a basic understanding in archives, and I'm looking to expand my knowledge into textures/image formats. Can anyone offer up some advice for a noobie like me?

PostPosted: Sat Jan 13, 2018 10:58 am 

Joined: Sun May 01, 2016 10:06 pm
Posts: 118
It depends on engine used and platform it was developed for but I'd say it starts with data and visual patterns.
There aren't that many de-facto used compression schemes for textures with BC (Block Compression, aka DXTC or S3TC) being the most ubiquitous.

PostPosted: Sun Jan 14, 2018 12:04 am 
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Joined: Fri Aug 08, 2014 1:06 am
Posts: 682
i have about a hundred scripts in their simplest form floating around you can reference along with samples provided in the same threads. :)
you can apply same steps you know from archive extraction to figuring out image formats.
in the headers i look for any combination of width, height, some kind of format ID and datasize.
i usually start with opening samples in TextureFinder to see if anything displays on a common format,
then if no satisfying results i will use Noesis built-in format functionality to identify anything exotic.
and from there just start forming a script and let the tools do the work, not a whole lot to it. :D

Quickbms.com link thread
Search bms scripts

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