Grass rendering question

[RWARCHPC]

I recently reviewed Andreas Lettner's video tutorial on rendering grass - specifically the setting whereby the camera dictates the density of the grass closest to the foreground of the view, and simplifies toward the background in order to conserve render time.The question is: How do you establish which camera ArchiCAD will use as the basis for foreground/background if there are multiple cameras? Or if in my case the view seems to be set for the wrong camera, is there way to reset the scene? You can see exactly what my problem is in the screenshot attached. Any suggestions/guidance would be greatly appreciated!