Can't join walls - unwanted line in facade

[elisag23]

Hi, I'm having trouble with this three walls. As you can see, the side walls are of one kind and the front "beam" wall is another. Now, the problem I have is actually between the side walls, which should be joining seemlessly. How can I fix it?

[elisag23]

Hi, I'm having trouble with this three walls. As you can see, the side walls are of one kind and the front "beam" wall is another. Now, the problem I have is actually between the side walls, which should be joining seemlessly. How can I fix it?

[barthbradley]

Make 'em the same material.  

[barthbradley]

Make 'em the same material.  

[ToanDN]

Unjoin. Paint the face of the beam wall to match the material of the side walls then join them again.

[ToanDN]

Unjoin. Paint the face of the beam wall to match the material of the side walls then join them again.

[elisag23]

how do you paint the face of  the beam wall?

[elisag23]

how do you paint the face of  the beam wall?