The image can be downloaded at the Imgur link. It should be HD, I think.
Though the picture is not really 4k, it is big enough to be a sick wallpaper, but the width is a tad bigger.
This piece took me about 5 hours total, on and off. I am extremely proud of this piece, and I think it is a huge improvement from m other pieces.
The background image within the "MMMMPH" text is also 4k, and can be found if you search for it in my Imgur account provided in the link to the download.