public static GameObject CreateDynamicDecal( 
   Mesh decalMesh, 
   GameObject obj, 
   DecalType decalType, 
   Material materialOverride 
);

 
RaycastHit hit; 
Ray ray = Camera.main.ViewportPointToRay(new Vector3(0.5F, 0.5F, 0)); 
bool wasHit = Physics.Raycast(ray, out hit); 
if (wasHit) 
{ 
    Material m = null; 
    if (hit.collider.gameObject.renderer) 
    { 
        //Get material instanse 
        m = Instantiate(i_decalType.i_material) as Material; 
        //Get bump from hited surface 
        Texture2D bumpMap = 
hit.collider.gameObject.renderer.sharedMaterial.GetTexture("_BumpMap") as 
Texture2D; 
        Vector2 bumpScale = 
hit.collider.gameObject.renderer.sharedMaterial.GetTextureScale("_BumpMap"); 
        Vector2 bumpOffset = 
hit.collider.gameObject.renderer.sharedMaterial.GetTextureOffset("_BumpMap"); 
        //Setup new bump 
        m.SetTexture("_SourceBumpMap", bumpMap); 
        m.SetTextureScale("_SourceBumpMap", bumpScale); 
        m.SetTextureOffset("_SourceBumpMap", bumpOffset); 
 
        //Burn decal 
        Mesh decalMesh = DecalCreator.CreateDecalMesh(i_decalType, hit.point, 
-hit.normal, hit.collider.gameObject); 
        //Create Decal Object 
        DecalCreator.CreateDynamicDecal(decalMesh, hit.collider.gameObject, 
i_decalType, m); 
 
    } 
}