i found a work around, placed a pillar, but i had to remove the ceiling above it and place it again before i could place the last ceiling on the picture.
But now i got another issue with the roof, i have tried in many different ways and i can’t get the inverted thatch wedge sloped roof to snap to the outside on the picture, and it the same issue all the way around on the roof.
I have tried to build over and under, nothing works, it just won’t snap.
I was trying to place 2 Thatch Wedge Sloped Roof with the inverted in the middle.
Edit: still have issue with image and links