itch.io

Is something like this good? You're trying to assign a sprite based on index, right?

using UnityEngine;
using System.Collections;
public class STMSetQuadData : MonoBehaviour 
{
    public STMQuadData quadData;
    public Texture[] textureArray;
    public void Assign(int index)
    {
        quadData.texture = textureArray[index];
    }
}