[obrhubr]

Thank you for pointing that out. The Atkinson dithering I was using was indeed messing with the results. I'll be updating the post shortly :)

[shiandow]

Still looks a bit dark to me, though the main issue is that webbrowsers simply refuse to display the image in a 1-1 resolution.

Edit: Oh and I see you suffer from the patterned runs of pixels that plagued madshi ;-) It's one of the reasons I prefer simple patterned dithers