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"GitHub Enterprise /.../ support for rendering PSD files will have your design teams jumping for joy."

I keep wondering how they do the PSD file rendering, sounds very intruiging. Is there a separate "thumbnail" automatically included in every PSD file or is GitHub doing a real PSD file rendering? In that case I wonder about font availability etc..

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PSD files may contain a full resolution rendered (flat) bitmap for interoperability. It's probably enabled by default when saving. Other file formats like ODT and ORA contain a rendered thumbnail (e.g. 256x256) just for fast preview in file browsers. Scaling down a couple of 20000x20000 images in a folder is no joke, and that's not an unusual size for digital artists.

Imagemagick can convert a PSD into a PNG.

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