img tag, 1x scale

img tag, 4x scale

img tag, 4x scale, image-rendering: pixelated

background image, no repeat, 1x scale

background image, no repeat, 4x scale

background image, no repeat, 4x scale, image-rendering: pixelated

background image, repeat-x, 4x scale, image-rendering: pixelated

background image, repeat-x, filter: blur(0), 4x scale, image-rendering: pixelated