Hair is not perfectly exported to USD

Hair that looks good in CC 3.4 is not exported perfectly to USD.

Check these out - in Machinima Path-traced renders:

Can you see that seam in hear line? There is no such error visible in CC.

From distance it looks just fine:

I tried this with a more pro hair asset, “Classic Bun” the issue remains, now it looks like there is a black thin line…

Here we have it just nice in CC:

Please help to get over with this?

Hi pekka.varis,
I don’t have the same hair in hand, the seam is caused by the scalp.
You can uncheck the “cutout” checkbox in path-traced mode to solve it, as shown by the 2 following screenshots.

In real-time mode, it should be checked and increase the “Opacity threshold” value until it disappears.
You can refer to the post in Reallusion Forum for more details
https://forum.reallusion.com/FindPost479689.aspx

Great!


Unticking that “Enable Opacity Cutout” option fixed this :)

But unfortunately only for the premium hair asset Classic Bun:
https://marketplace.reallusion.com/classic-bun

In the cc 3.4 free trial hair assets there is not this option in shader…
Is there something that could make this trick for these hair assets?

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which one are you referring to?
I think all of them have this attribute, although the material name may not be “scalp” exactly

It would be great if they all have that feature!

See this video:

The hair is this free CC3 embed hair:

bun_scalp
in CC, before you export change hair’s mesh “scalp_high_polytail” type from “Digital_Human Hair” to “PBR”
then you should see the it

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SO nice :)
Thanks again weienchen

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