Frist try hoping to be published in the workshop.
A kind of kunai for Rikimaru trying to refining the workflow and stick with the game style while understanding how the game shader behaves.
Model has 284 triangles I think that this shape didn't take benefits from more triangles at in game size where also the octagon ring seem to be a real circle.
Texture is 256x128, but has been edited at 1024x512.