Have you ever had a hatch pattern display incorrectly? If you are using a hatch pattern like gravel or concrete the sides of the intended shapes within the hatch may not line up properly. Giving you results that don’t look at all like your desired hatching. This typically happens when the area that you are hatching is very far from the origin (0,0) of your coordinate system. In civil drawings moving the objects or changing the location of the origin is typically not an option because it would destroy the coordinate system of your drawing.