Apologies for not being more timely in this up date. To correct the oblique line and the black boxes which appeared over the Guilded Vale background go to options, then graphics, then move the graphics quality slide to the left, i.e. decrease quality and the boxes and line vanish. As far as any visual change in the quality of the background or characters there is none, or so little that the eye cannot pick it up. This is a truly wonderful game, but it has a definite learning curve. Keep at it, do not get frustrated and you will have many fun hours.
Odd how games which have 1/3 the GB have all positive reviews and Pillars is always " A great game, BUT….". Perhaps there is just too much going on at once for it to play well. No question, the backgrounds, characters, options, all top notch. The glitches seem to be in the mechanics. Here is a strange one. Once in Guilded Vale there is a fine white line that crosses the screen from upper left to lower right with multiple black dots on either side of it. It remains fixed on the screen while the game passes "under" it with apparently no change in the game. This appears after the first trip to the mill. Have deleted and re-downloaded twice thinking that this was a an error from my router or some-such, but it remain in place. Has this happened to anyone else and how did you fix it? Otherwise it plays as well as others have indicated. Wonderful game which seems to be having a few growth pains.