Hi Linford,

You currently have the camera compound open (Edit Compound In Place option). Because of this, the compound will not be updated when you update Aximmetry. In fact, updating will probably break several of its functionalities, as the internal linked compounds inside the camera compound might change in the new version. To avoid issues, you should revert the compound using the Revert In-Place Modifications option. You can find more information about this here: https://aximmetry.com/learn/virtual-production-workflow/scripting-in-aximmetry/flow-editor/compound/#linked-compound
Also note that the Holdout Mask feature was added in the latest version of Aximmetry (2025.1.0).

Additionally, the Holdout Mask will only affect the tracked cameras (T Cam) within the mixed camera compound. The virtual cameras (V Cam) do not have such functionality. To enable similar functionality for virtual cameras, you will need to edit the camera compound, locate the virtual camera's input line compounds within it, and follow the steps detailed here: https://my.aximmetry.com/post/4647-how-to-use-holdout-matte-in-the-virtual

Warmest regards,