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How do you make a custom background?

A Question for Sonic 3 A.I.R

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The Background does not work?

I tried to replace some files, but I'm really confused on how to make those backgrounds. I saw some examples which were unique, and loved it! But I wished to replace the Sandopolis Zone, and I could not. Can somebody help me what the error is? (I did only add a .json file and .png files for both Sandopolis acts.)
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JacksNormalMods avatar
JacksNormalMods Joined 1mo ago
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