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I am creating a png24 as sprite for css background images.
Due to padding issues I have to keep a certain amount of space between the icons in the sprite.
When doing so the file size of the png increases even though no information was added… Just empty, transparent space.
Is there any workaround for this? (I have already tried png compression – smushit – but no significant improvement made…)
Thanks
Empty, transparent space is information as well. If a PNG has an alpha channel, then every pixel consists of the informations
(r,g,b,a)for red, green, blue and alpha components. In case of a transparent pixel the alpha is simply 0, but it’s nevertheless information that is present in the file.