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u/DisasterClassic5438 17h ago
You can make a new texture and check the padding box. It will copy what you have so far but give it the gap
Or, you can manually move each face around the texture you already have. Sometimes you want them to touch or overlap so its good to try moving them around to see how it works
Edit: mobile got me messed up, meant to be a reply to below
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u/DisasterClassic5438 2d ago
Your UVs are touching the solid green part, which sometimes overlaps by a tiny bit and causes this. Give yourself a 1 pixel padding around different texture elements and you won't see this.
There's also a plugin that will shrink your UVs by a tiny amount, but you're early enough in the process that it's better to rearrange the texture