Generate a top-down view image with a white background featuring a map of the lower 48 United States. The map should have a distinctive denim texture, giving it the appearance of denim fabric. Surrounding the map, create a wall or barriers constructed from realistic brick textures. The brick wall should encircle the entire map, providing a sense of containment and structure. Ensure that the denim-filled map stands out against the white background, and the brick wall/barriers add depth and context to the overall composition. --ar 16:9  --s 750