TextureScaling

Renderer r;

void Awake()
{
    r = transform.GetComponent<Renderer>();
    SetTextureTiles(transform.localScale.x, transform.localScale.y);
}

void SetTextureTiles(float x, float y)
{
    float width = x / 0.5F;
    float height = y / 0.5F;
    r.material.mainTextureScale = new Vector2(width, height);
}