Couple of days back HTC updated the Dot View App that works with Dot View Case for HTC One M8. The update came up with handful of new features and themes. The coolest thing is the addition of themes for wallpapers.
There are 18 in-built wallpapers which you can use for wallpaper, moreover you can also choose any pic from your gallery or can take one. Its said that the normal pictures won't look much good, but the included stock images are pretty good though.
So what you are waiting for? Head over to the play store and grab the update.