Place any of the PCG volumes into the scene. Adjust the scale accordingly.
Add spline area. Enter Modeling mode
If you do not see Modeling section, make sure that plugin Modeling Tools Editor Mode is enabled.
Draw the closed spline. Press Accept.
Check what tag is used in selected PCG graph. In this case it’s pcg_spline_bushes.
Add the same tag to the spline
After adding the tag, bushed should spawn inside of the spline.
You can adjust the density parameters inside PCG Component