How do I make a celtic knot? I have no idea how I'm supposed to tackle this, I've tried making a three-point star but after that I had no idea how to continue since a celtic knot has rounded edges.
Your question is much too vague, how is your 2D shape supposed to be in 3D? I've tried a basic shape, tell me if that's what you want, I began with a half-circle as your knot is basically made with 3 half-circles: