VRayFastSSS2 weird white lines

[munchac]

Hi i have issue with those weird lines on my model when im using VRayFastSSS2 material. I'm hoping someone can help me solve.

[vlado]

Is it possible that the model has flipped normals in those areas?

Best regards,
Vlado

[munchac]

normals are ok. it happens when you join the FastSSS2 material into the bump material, same result with basic sphere

edit: it happens only with bump shadow on

[Paul Oblomov]

check your lights shadows bias. It may be negative

[Morbid Angel]

I believe this is due to absence of glossy frenel. I would suggest to disable fast sss reflection/specularity and add it back with vray blend material and vray material in additive mode.

[vlado]

Hm, the bump shadows is probably the issue...

Best regards,
Vlado

[Paul Oblomov]

I just thought it is the same thing.

[vlado]

No, it's the "Bump shadows" option in the bump mapping section of the VRayMtl and VRayBumpMtl materials.

Best regards,
Vlado