Change material on Object / Raycast

I want to be able to change the material of specific tagged objects; For instance, I have activated a palette of colours and textures that only work on objects with the tag "wood".

I don't want to expose the objects in the inspector, just need to find them by tag:

 #pragma strict
 var myObject : GameObject;
 var texture1 : Texture2D;
 function Update () 
 
 {
 if( Input.GetMouseButtonDown(0) )
     {
     var ray = Camera.main.ScreenPointToRay(Input.mousePosition); 
     
         var hit : RaycastHit; 
         if (Physics.Raycast (ray, hit, 100)) 
         
                 if (hit.collider.tag == "wood")
                 
                 {
                     myObject.renderer.material.mainTexture = texture1;
                 }
     }
 }

If I go with

hit.renderer.material.mainTexture.... and so on, I get this error:

 Assets/Paintbrush.js(17,37): BCE0019: 'renderer' is not a member of 'UnityEngine.RaycastHit'.