Smart Hair + Toon Shader

[BuellerBuellerBueller]

So I’ve noticed recently that when using just about any type of Smart Hair on a character with the Toon Shader on, I get a strange effect of glowing or white lines.

I’ve tried a few things to fix it, mostly switching the hair textures shader type to Traditional or Reflection Surface. This get’s rid of the lines but also makes the hair look terrible in different ways since it wasn’t mean to have that shader type.
Here’s some pics of what I’m talking about. Has anyone else encountered this? Any help would be awesome.

[BuellerBuellerBueller]

Okay so it turns out you can just use Exclude Effect to leave the toon shader off the hair, which so far seems to be the best solution I can find. Although you do end up with the outline of the scalp appearing over the top of the hair. But it’s better than this weird glow, so it works for my purposes.

[sunlikevoid]

try changing opacity of the hair pieces from 100 to 99.

[BuellerBuellerBueller]

That absolutely works perfectly. Thank you so much.
Would you be able to explain to me why that works?