@ The Namek, thanks
@ bakedbeing, thank you, Not AO or cavity mask, just use the fiber masking.
@ SolidSnakexxx, @ EZRA52, thank you
Here's a screengrab combo
Fibermasking is desabled now, as I unmasked foliage to do some sculpting (move tool) and multiplication ([W] + ctrl, [R], [E])
Anyway, use the masking profile curve. To mask this ~1/3 near the tip.
I used two lights, the main has SSS eanbled too, the second as backlight, no shadows
On the shader set up I also added a picture for reflection
Here the sss material for foliage. Feel free to use it, edit it (the sss color for instance, or the S_Exp value on shader mixer. Normally a 1 or less is useful on bigger meshes but on these fibers ... )
Just remind you to enable SSS under lights properties panel, use a second SSS backlight without shadows and SSS under BPR panel.