Well, the blend mode was already set to masked. because if it wasn't. I wouldn't be able to put the opacity on it at all but I did change the textures filter to nearest like stated which didn't change anything.
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Oh that makes sense it was basically turning a color into transparency then, no problem at all, I'm glad you managed to make it work, feel free to hit me up if you need any kind of assistance!
And I can't run Unreal Engine because I currently have no GPU on my desktop since mine broke down a cloupe of months ago, because of that my computer struggles to run Unity and Unreal doesn't even open anymore.