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wolftatoo, posted Wed Jan 18, 2017 2:48 pm (20274)

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I want to make a modded image the exact bytes-size(not pixel size) of an original one!
How can i do that?
Please help!

MerlinSVK, posted Wed Jan 18, 2017 8:05 pm (20292)

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Wow! So much information! Now we can start guessing the format.
First try: PNG?

wolftatoo, posted Thu Jan 19, 2017 4:16 am (20295)

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Yes, i need help on PNG.
I already can increase JPG by editing its EXIF.

MerlinSVK, posted Fri Jan 20, 2017 1:13 pm (20309)

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Why you need the exact same file size?
For reimporting back into archive?

If yes, could you use smaller PNG and the rest simply fulfill with zeroes?

• If yes, try FileOptimizer (it has some optimization utils also for PNGs) which could make smaller (byte-wise) PNGs than original
• If no, than there is probably no way to make a new PNG with same size

wolftatoo, posted Fri Jan 20, 2017 10:42 pm (20312)

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Actually i found a way to do that by: opening the png in a hex editior and ad spaces to the end till i got the exact bytesize that i wanted(pics still get reconized/read by any programme but the game)
But, the game wont reconize the modded pngs ! Its probably Crc check.
Any ideas?

MerlinSVK, posted Sat Jan 21, 2017 11:46 am (20316)

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I would firstly modify few bytes in the original image, to check if it really has a crc check.
If that's the case, you will have to find where are stored the checksums and modify the one you need.