Horizontal Tiling Effect on Pixma Photo Printing

[crcalan]

I'm getting a consistent horizontal tiling effect, like window blinds, when printing photos on my Pixma MG7720. Attached please find a photo of a praying mantis and then what it looks like when I print it. This happens with all photo printing, but no problems with regular copy printing. Does anyone have any idea why or what I'm doing wrong? I ran the the software diagnostic and everything seems to be clean and right.  Thanks much. 

[Patrick]

Hi crcalan,

What version of Windows is installed on your computer?

If you are using a Mac, what version of OSX is installed?

What program are you using to print your images?

Who is the manufacturer of the paper you are using and what is the specific paper type that you are printing with?