Combine Mode

        There are five options for this: Add，Subtract，Merge High and Merge Low, Replace.

        These determine how the subsequent relief is combined with the previous one, for instance whether it sits on top of the original shape or blends into it.

     When create relief or surface in ucancam,  the default combine mode is Add.

Command:

 Menu【Relief > Combine Mode】                       

The five options and their specific effects are described on the following 

there are 2 reliefs: star and flat ball

Add: to create a raised relief

Subtract: to create new recessed reliefs

Merge High: keep the highest

Merge Low: keep the lowest

Replace: new relief replace the previos