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Each duplication increases the opacity of semi-transparent pixels. Repeating this a few times will eventually force most pixels to 255 alpha . Installation Instructions To install any of these plugins: Download the .zip file from the Paint.NET Forums. Extract the .dll file.
: Specifically designed to make the canvas opaque by setting alpha to 255 for all pixels. It is useful for fixing "almost-opaque" sections or removing transparency before saving to formats that don't support it.
— they often contain malware.
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