Is there a technique when 4 walls meet at one point?

[LeeJaeYoung]

The left side is the same type of wall
The right side is an L shape with two identical walls.

Left 4 wall  and right 2 wall

right 2 wall

this is my best

[Eduardo Rolon · Accepted solution]

Read here,

https://www.onland.info/archives/2010/07/fixing_wall_corners_with_columns.php

[LeeJaeYoung]

Thank you so much. ^^

Re: Intersection Issues - Graphisoft Community

How Walls are Connected in Archicad - Graphisoft Community

[Ernest Atanasiu]

If Building Materials have the Intersection Priority correcly set-up, that intersection should be cleaned automatically. 

In most cases it helps to move the Reference Line next to one of the Core lines and keep that rule consistent.