Thanks. I originally just wanted pixel-to-pixel dithering (quite difficult with modern browsers and retina class displays) but after I saw the results I knew I

Thanks. I originally just wanted pixel-to-pixel dithering (quite difficult with modern browsers and retina class displays) but after I saw the results I knew I needed to add lower resolutions as well. It looks really good with some images, especially photos with lots of details - almost like a high-quality printed magazine. However you are right that the extra detail can be distracting to the eye.