Cubemap.format
var format: TextureFormat;
TextureFormat format;
format as TextureFormat
Description

The format of the pixel data in the texture (Read Only).

Use this to determine the format of the texture.
	// Print the format of a given cubemap.
	var c : Cubemap;
	if (c != null)
		Debug.Log(c.format);
	else
		Debug.Log("No cubemap was assigned, please assing one on the inspector.");
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public Cubemap c;
    void Example() {
        if (c != null)
            Debug.Log(c.format);
        else
            Debug.Log("No cubemap was assigned, please assing one on the inspector.");
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public c as Cubemap

	def Example() as void:
		if c != null:
			Debug.Log(c.format)
		else:
			Debug.Log('No cubemap was assigned, please assing one on the inspector.')