1. Take a square as an example to use the shade-fills in CAD, as shown in the following picture,

2. Enter HATCH, then press enter key, or click on the Hatch button, to open the Hatch and Gradient window, as shown in the following picture,

3. Choose a suitable pattern from the list, as shown in the following picture,

4. Then choose the preferred color, angle, and scale.

5. Click the “Add: Pick points”, then select a random point within the square and click OK, voila, as shown in the following picture,