> For the complete documentation index, see [llms.txt](https://docs.pollination.solutions/user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pollination.solutions/user-manual/rhino-plugin/pollination-commands/alphabetically/po_projectchildtohost.md).

# PO\_ProjectChildToHost

Check all child objects (apertures and doors) of selected rooms to ensure they are coplanar with their host faces.

Notes:

* This command will automatically project the child geometry to its host's plane.
* It is important apertures and doors are coplanar to get a valid energy and radiance model.

## See Also

* [PO\_OffsetChildObjects](/user-manual/rhino-plugin/pollination-commands/alphabetically/po_offsetchildobjects.md)

## Video Tutorials

{% embed url="<https://youtu.be/SCqkWwhoov4>" %}
How to Fix Problematic Apertures
{% endembed %}