In projects involving more than two surfaces, the techniques for baselap, truncation, and conformity are often used in combination ([[:file:using-and-improving-surface-models-built-by-computer_fig12.png|Figure 12]]). The following rules are used to order the techniques: | In projects involving more than two surfaces, the techniques for baselap, truncation, and conformity are often used in combination ([[:file:using-and-improving-surface-models-built-by-computer_fig12.png|Figure 12]]). The following rules are used to order the techniques: |