Hatching is a technique using straight lines to make objects in a drawing look three-dimensional. It is often used as a technique for shading. There are more concentration of lines for shadows and less concentration of lines for light. Crosshatching is the same thing as hatching but using two lines instead of one. The two lines cross each other at an angle. Crosshatching is also used to depict three-dimensional objects by shading.
Stippling is a technique using dots to make an object look three-dimensional. The sizes and concentration of dots vary according to shadow and light. For example, to make a part of the object look lighter, the dots are smaller and more dispersed.