Changing rope length ugly when we use chains

[lacasrac]

When we use rope, we cannot see what happening, but when I use chains, it will be very ugly.
Can you help me how to change it to simulate a better visualization?

Here is my code

Code:

        public void ChangeLength(float speed) {
            //ezt update-ben kell meghivni
            if (isLengthChangable) {
                if (_obiRopeCursor == null) {
                    _obiRopeCursor = gameObject.AddComponent<ObiRopeCursor>();
                    _obiRopeCursor.cursorMu = .1f; //feletol
                    _obiRopeCursor.sourceMu = .1f;
                    _obiRopeCursor.direction = true;
                }

                _obiRopeCursor.ChangeLength(rope.restLength + speed * Time.deltaTime);
            }
        }