Inspector doesn't refresh in dinamical script change

Hi everyone,

After searching the answer on forum and related info, I give up.

I'll try to explain as best I can, the problem that I have is this.

When the values ​​I coded in my script change, have no effect on the inspector (neither in the game) until I change the scene or restart the game.

It only happens when I change script from another script.

For example, changing a Texture:

Command Script:

 //Inside a GUI function
 
             if (cucat.GetComponent(scriptCucat).whiteTNT == false)
             {
                 if (GUI.Button (Rect (Screen.width/1.8,Screen.height/2.4,Screen.width/2.5,Screen.height/15), "WHITE TINT"))
                 {
                     cucat.transform.GetComponent(scriptCucat).TNTNUM = 1;
                     
                 }
             }
             if (cucat.GetComponent(scriptCucat).greyTNT == false)
             {
                 if (GUI.Button (Rect (Screen.width/1.8,Screen.height/2,Screen.width/2.5,Screen.height/15), "GREY TINT"))
                 {
                     cucat.transform.GetComponent(scriptCucat).TNTNUM = 2;
                 }
             }
             
             if (GUI.Button (Rect (Screen.width/1.8,Screen.height/1.7,Screen.width/2.5,Screen.height/15), "ORIGINAL TINT"))
             {
                 cucat.transform.GetComponent(scriptCucat).TNTNUM = 0;
             }

Commanded Script:

 //Inside Update()
         
     if (TNTNUM == 0)
     {
         
         cucatMesh.renderer.material.mainTexture = ORIGTNT;
         
     }
     else if (TNTNUM == 1)
     {
         cucatMesh.renderer.material.mainTexture = WHITETNT;
     }
     else if (TNTNUM == 2)
     {
         cucatMesh.renderer.material.mainTexture = GREYTNT;
     }    

Any suggestions?