GUIStyle.none

설명

Shortcut for an empty GUIStyle.

This style contains no decoration and just renders everything in the default font.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void OnGUI() {
        GUI.Button(new Rect(0, 0, 250, 100), "I'm very bare", GUIStyle.none);
    }
}