TextureFormatCheck.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TextureFormatCheck : MonoBehaviour
{
    public Texture2D tex2D;
    public Material mat;

	// Use this for initialization
	void Start()
    {
        mat = this.GetComponent<MeshRenderer>().material;
	}
	
	// Update is called once per frame
	void Update()
    {
        if (tex2D != null)
        {
            Texture tex = mat.GetTexture("_BumpMap");
            // Debug.Log(tex.);
            Debug.Log("Format: " + tex2D.format);
            this.enabled = false;
        }
	}
}