godot/editor/icons/Curve3D.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path fill="none" stroke="#e0e0e0" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 2 2 5l6 3 6-3v6l-6 3-6-3"/></svg>