ok it kinda works on cpu, although effect isnt very nice. certainly no good for closeups.
On gpu, nothing. only the raw edges tex gives any effect at all.
Is there some technical reason why we cannot have a map slot for the radius? even one for the smoothness of the curve (so we could blend from nice smooth fillet to hard chamfer whilst also varying the radius..) it would make the already extremely useful map 10x more amazing.