Priority

The priority rating governs the way components of the same group behave when they intersect. A wall with a priority rating of 200, for instance, will run straight through a wall with a priority rating of 100 as its rating is higher.

One instance of element interaction is walls which cross each other’s path. A ‘hole’ is created in the first wall. The hole extends along the entire height of the wall. This is called element interaction. You can determine which wall has a section (hole) removed from it by setting a different priority rating for each wall. Walls with a higher priority rating have precedence over walls with a lower priority rating.
This interaction always occurs with elements of the same component group. But they do not interact with components belonging to a different group.

(1) A 'hole' is 'cut' in this wall

Component groups, overview