> For the complete documentation index, see [llms.txt](https://cgtoolbox.gitbook.io/cgtoolbox-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cgtoolbox.gitbook.io/cgtoolbox-docs/pcg-random-assemblies/pcg-data-asset.md). # PCG Data Asset First of all you will need a PCG Data asset, it can be created from a right click on a level instance asset in the content browser. Follow these two steps: *** 1\) Create a level instance with a bunch of StaticMesh Actors selected, then right click ⇒ Level ⇒ Create Level Instance. *A Level instance is a regular Level which can be used in other level (more infos* [*here*](https://dev.epicgames.com/documentation/en-us/unreal-engine/level-instancing-in-unreal-engine)*).*
Actors of the level instance must have an Actor tag properly set to bind them to a variant definition (random XForm, mesh, etc).

Example of actor tags.

Where to set actor tag on static mesh actors.

{% hint style="info" %} To easily set tags on actors, check [Actor Tags manager](/cgtoolbox-docs/actor-tags-manager/intro.md) (available on fab) ! {% endhint %}

Create of a level instance from selected Actor(s).

{% hint style="info" %} The tool works with Packed level instance as well as Level Instance but keep in mind than other actors than static mesh actors in a Level Instance will be ignored. {% endhint %} *** 2\) Then you can create PCG Data asset from level instance by a right click on the level instance asset in the content browser. By default it saves it on the same folder with a *\_PCG* prefix. It's perfectly fine but you can of course save it wherever you want.
*** 3\) You create a new [Random Assembly Defintion](/cgtoolbox-docs/pcg-random-assemblies/random-assembly-definition.md) and add the freshly created PCG Data Asset in its PCG Asset entry:
*** You can edit a level instance content directly from the edit button on the level instance actor:
#### **Warning:** If you update the content of the level instance, (tags, or adding / removing actors), you'll need to update the PCG Data Asset accordingly either from: {% tabs %} {% tab title="Random Assembly Widget" %} The [Random Assembly Widget](/cgtoolbox-docs/pcg-random-assemblies/random-assembly-widget.md):
{% endtab %} {% tab title="PCG Data Asset" %} On the PCG Data asset directly:
{% endtab %} {% endtabs %} ***