LineRenderer.SetWidth

Description

Set the line width at the start and at the end.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Adds a lineRenderer to this transform and
    // Converts the line Renderer into a triangle.

    void Start()
    {
        LineRenderer lineRenderer = gameObject.AddComponent<LineRenderer>();
        lineRenderer.SetWidth(0, 3);
    }
}