It doesn't let me edit the link, but I'm confused by what even happened here... I posted this from my phone and that wrong link doesn't show up in my clipboard history.
That's the easy part, just use a color space with imaginary primaries (see e.g. ProPhoto RGB), or use one with real primaries that allows for negative values – e.g. Windows uses floating point scRGB for HDR, which is just linear BT.709/sRGB, but negative RGB values can be used to cover the full range of real and imaginary colors.
To be clear, PNG only supports lossless compression, while WebP has separate lossy and lossless modes. AVIF can do lossless compression too, but you're usually better off using WebP or PNG (if you need >8 bpc) instead as it really isn't good at that.
> This was the exact same technique that was used in 2021 by Audacity's update mechanism, which also redirected traffic to servers hosted in other Aeza Group ASNs and planted a dropper for later campaigns.
I can't find anything about this, can you link a source?
Link should be: https://hydrogenaudio.org/index.php/topic,129691.0.html