Manipulating SVG images is an acquired art, and in some instances, it will clearly be overkill for what we need to achieve.
Instead, for those occasions where we need the detail in our images, we might normally use the JPEG format, or potentially PNG as an alternative. There's nothing wrong with either, but, it's old hat, and I do like to push the boundaries of what is possible! In addition, the JPEG image format is lossy and does not support alpha channels; PNG images are lossless, but suffer from larger file sizes for more complex images. If all we did was simply insert images onto a page, then PostCSS wouldn't be helpful here; instead, how about considering a different format altogether?
Enter Google's WebP. You'd be forgiven for thinking "Web…what?", as it isn't a common format! Part of this can be attributed to the lack of take-up; the only browsers to support it natively are Chrome, Android, and Opera. That doesn't mean to say it should be discounted. The...