Make a 3D tube with a Bézier curve? How can I make a Bézier curve into a 3D-noodle-like structure (like a tube)?
When I try, it keeps turning out like a rectangle with corners.
To make a tube, set the Fill to full in Curve > Shape:



Then increase the bevel Depth and Resolution in Curve > Geometry:



If you want a more complex/custom shape, you can use a bevel object: