Hi @mrmraw75
You can achieve the same effect as Primary Visibility by setting an object’s attributes to the following:
Visible: Off
Affect Indirect Dynamic Lighting While Hidden: On
Objects with this will be invisible to the camera, but will show up in reflections, cast shadows, and affect GI.
Alternatively, there is a Holdout setting which does the same, but also punches out the screen as black wherever it is visible to the camera.
These both work in Lumen & path tracing.