@TheShy In general yes it refers to the field of view of a selected camera inside Rhino as a camera widget is an object of Rhino itself and both RN and V-Ray use it for its further evaluation. However, there shouldn't be a scenario where it is visible as a preview in the viewport while it's not rendered. If something like this happens it can mean three things, first, you've clicked the camera shutter icon in Ecosystems on this ecosystem but this would disable grass entirely from rendering, second data transfer between RN and V-Ray was interrupted for some reason, third it's a bug. This would need further evaluation and a minimal *.3dm example to replicate the issue.
