My tiler didn't cut the 1X1 tiles in 45 degree angle at all. I was quite surprised to see it, but it worked out well. Sorry, I don't have a close up picture.
Only thing is if you do this, grout lines from the top surface to one of the side of the walls will not match as you can see below. It bothered me like a 5 seconds, but I moved on. Glad I did, because you hardly notice those grout lines because my tiles give off so many variations of colors that they blur the grout lines. Also light reflection from water flowing over hide them as well.