This mode will produce a contact if either PhysicsShape agree, effectively an OR operation. A contact will be produced if the following is true: (contactFilterA.contacts AND-MASK contactFilterB.categories ) OR (contactFilterA.categories AND-MASK contactFilterB.contacts). This will not match query results if similar values are provided to the QueryFilter. To get the same results, set PhysicsQuery.QueryFilter.categories to PhysicsQuery.QueryFilter.Everything.