Glass Edges in Vray


trying to render glass canopy and having trouble with the edges of glass being shown,
I tried using black tinted glass on the edge’s vs regular glass on the top and bottom of glass

when I use the black tinted glass i turn the fog down and it still doesn’t show on the edges so you can’t really see what’s going on and were trying to explain a glass overhang.

i attached a glass canopy picture for reference showing the edges are darker