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Developer creates tool to check PNG transparency loss in color-reduced exports

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A software developer encountered issues last week when exporting a transparent PNG sticker to a 256-color palette. The image's soft shadow turned into a solid black band on white backgrounds due to alpha channel compression. The developer subsequently created a Python script using Pillow and NumPy to analyze transparency data before color reduction. The tool compares original and exported images on multiple backgrounds to detect visual artifacts. Testing revealed that indexed PNG files can preserve more than two transparency levels despite the color limit.

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