This is a third part to this post:
I sampled my pictures from this post:
Explanation
This is from the Official Terraria Wiki:
In other words, any Open Space within a house that exceeds 4 Blocks in height or width needs Walls to fill-in the gap and act as a “Block” in order to make it valid.
- This rule is also applicable in the creation of valid bedding.
Examples
Invalid
There is a 1x6 Area of Open Space at the top.
Valid
There is no Open Space that exceeds 4 Blocks in height or width.
Note
- You can increase the area of a house without exceeding 4 Blocks in height or width with the type of intersection boxed in green.
Valid
There is no Open Space that exceeds 4 Blocks in height or width.
Invalid
There is a 5x1 Area of Open Space at the top left and a 5x1 Area of Open Space at the bottom.
Valid
There is no Open Space that exceeds 4 Blocks in height or width.
Challenge
Figure out why these two bedding areas are valid.