Please note, the 3D was made using Daz Studio and I iddn't have an nvidia graphic's card, so it took ages to render every image. I stopped at 10 minutes per image which is why the quality is so bad. I have a nvidia card now so it's not an issue anymore.
To all artists using Daz studio for renders, if you want to avoid the "black lines" on foreheads: 1) Select the hair 2) Then switch to the the "Geometry editor tool" 3) Go to the "Tool Settings" tab and "hide" the "Cap" (Click the eye icon next to "Cap")
This will remove the hair cap's geometry from the render and prevent the "black lines" but not remove it from the actual scene so no need to worry about hair going wonky because cap is gone.