Hi t0rn4d0

There are several ways to make certain objects in an Unreal scene appear in front of the talent, or in other words, to occlude the talent.

In Virtual Camera productions, open the CAMERAS control board and select the CAMERA & RENDER SETUP control panel. You can find the Allow Virtuals switch there.

When Allow Virtuals is turned Off, virtual objects, such as a table, when placed in front if the Billboard, will occlude the talent.
When Allow Virtuals is turned On, only virtual objects that have been configured for this purpose in Unreal will occlude the talent, when placed in front of the Billboard.
You can read more about these settings and how to configure the relevant Unreal objects in our documentation:
https://aximmetry.com/learn/virtual-production-workflow/green-screen-production/virtual-camera-workflow/setting-up-billboards-in-virtual-camera-compounds/#billboards-in-virtual-camera-compounds-with-aximmetry-de-unreal-engine-rendered

In Tracked Camera productions, open the INPUTS control board and select the SCENE control panel. First, make sure that Use Billboards is turned On, since this is required for virtual objects to occlude the talent.
The Allow Virtuals switch is available here as well, and the setup is the same as for Virtual Cameras.

You can find more information about this case in our documentation:

Warmest regards,
Adam