When the tuff bricks were first released to the general public, a large issue with them was that they had incorrect shading on the topmost row of pixels, causing them misaligned themselves with other brick types. However, when I was building with nether bricks recently, I came to the shocking realization that the nether bricks textures all had the same issue
So I fixed it with my limited paint.net
skills and posted the project here
May you never be able to unsee it now! >=)