You can use a predefined hatch pattern or solid fill, or you can create your own hatch patterns.
There are several methods for creating solid-filled areas.
A gradient fill is a solid hatch fill that gives the blended-color effect of a surface with light on it. You can use gradient fills to suggest a solid form in two-dimensional drawings.
You can choose from more than 50 industry-standard hatch patterns. Additional hatch patterns are available from external pattern libraries.
You can define a simple hatch pattern based on the current linetype.