The union is two parts: one normally rotated (to make the square) and the other one a small part on the inside specifically rotated 45 degrees (and transparent). This was done so that the texture would go across the 45 degrees that I wanted it to. The only other solution that I’ve found (which didn’t work very well) was making a bunch o negative parts and cutting off the sections of glass that I don’t need. Thanks for the response!
On second thought, I don’t think that could be it due to the fact that it has a subtle graident from the top and no transparent background. The other identifying detailt is that some of the lines have different weights.