Grasshopper BRep Edges Casting Shadows and Showing Rhino 8

Hi Experts,
I’m just wondering if someone could help me with my display settings.
I’m having trouble hiding Grasshopper BRep Edges in a Rendered Viewport.
Right now, I have a Preview Boundary set up in Grasshopper, surrounding a Custom Geometry Preview Component so that I only see the Previewed BReps.
However, the Rendered Viewport shows the BRep Edges as a faded colour, and if Shadows are turned on, then the BRep Edges show through the BRep Shadows, as though black.
The only setting that seems to adjust this issue is the Skylight Shadow Quality slider in the Rendered Shadows Properties Menu.
Please let me know if I am missing something.
I’ve tried Hiding Mesh Edges in the Display Menu in Grasshopper, but nothing seems to work.
Thanks!
Jonathan

Have you disabled preview on all GH components that might be showing those edges?

Yes, I’m using a Preview Boundary that isolates everything but the Custom Geometry Preview Component.

Sorry, I don’t know what that means? Any reason you haven’t posted the code?

Just a personal project I’d like to keep private.
I was just wondering if anyone has come across this issue in Rhino 8, or if it’s just me.
In Rhino 7 I used to isolate geometry using the Only Draw Selected toggle at the top.
In 7, this would isolate everything but Rendered Materials.
I’m wonderin if the switch made in 8 has anything to do with the display issues I’m coming across.

If you can’t demonstrate it with a simple example… :zzz: