This was a bit of a material study for replicating a simple but interesting reference I found. While in the reference it looks as though it could repeat indefinitely I had to overcome the issue of the pattern not repeating in a standard texture ratio like 1:1 or 2:1 without stretching. To overcome this I opted to use the pattern for acoustic tiles, but I'd definitely be interested to find a way to solve the repeating issue without sacrificing part of the initial goal.
The triangles don't have quite as harsh a dent in them and aren't quite as deep as the reference image as it lead to some harsh shadowing. Thankfully though the indented triangles are completely procedural so it's extremely simple to increase the indentation in them once I find a way to overcome that.