> For the complete documentation index, see [llms.txt](https://btehkmu.gitbook.io/btehkmu-zhi-nan-guide-book/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://btehkmu.gitbook.io/btehkmu-zhi-nan-guide-book/guide-book-en/getting-started/understand-details/ground-decoration/exterior-walls.md).
# Exterior Walls
Use the /tpll method to mark the exterior wall and then stack up; for the method, refer to[modeling](/btehkmu-zhi-nan-guide-book/guide-book-en/getting-started/building-basics/3d-modeling/modeling.md)。\
Known fence height: 1.86 meters ≈ 2 meters = 2 blocks high
Although you can't directly see the parking lot inside and behind the wall, if it's not finished the building's completeness will decrease, so we still need to do some surface work.
For example, change the floor color, underground entrance, garden (use your imagination c'mon!)
But I don't know their exact positions, what should I do?
{% hint style="info" %}
/tpll can not only be used to locate the corners of a building, you can also accurately find where a detail on the building is, for example the position of a chair placed on the roof.
{% endhint %}
Here's a fun fact: actually we also don't know what the inside of the building's walls or the back looks like, but at least change the ground color and block the view into the building to finish basic decoration. Thank you!
