Pixiveo is a great artist, but these uploads are awful. All the images are both massively downscaled and extremely compressed, to the point they're barely even readable.
Pixiveo has a Deviantart where they upload all their art in high resolution. If you want to browse it, go there.
https://www.deviantart.com/pixiveo

Base +6, Demon Rin -9, Novanity +7

You can download the original size with the link at the bottom of the viewer..

Base +2