The Texture Rotation slider for Canvas items can’t rotate textures by 45 degrees; the value for that would be .125, but the slider only supports up to 2 decimals, so that can’t be entered without it getting rounded down.
It would be so beautiful if the decimal cap could be raised for that slider so that I could crawl on my 45 degree floor and admire the floorboards perfectly aligned with my beautiful 45 degree angled walls.