The shaders available through our homepage are "generic" shaders, meaning, they're meant to provide a solid base to start from. They will need customization though, depending on the character you're applying them too.
By default, they're set to work with caucasian skin types, they will definitely need adjustments for dark-skinned characters - most importantly by increasing the SSS scale values.
The Bentley hair and Sebastian HD shaders were unfortunately based on version 1.2 of the OctaneRender for DAZ Studio plug-in - which at the time, not only tested our develiopment skills but was still pretty bug-riddled.
As you might have noticed wqe dropped support on all the new shaders for version 1.2 meaning that 2.1x is a requirement.
We will release updates for those two shaders based on the 2.1 versions of our shaders though.
I'd like to apologize to any user who still might have problems with these, but they will be fixed very soon.
Promised!
Thanks for your Patience until then.
W10 64 bit | i7 3770K | MSI Geforce RTX 2080 (8GB) + GTX Titan Black (6GB) | 32 GB DDR3 RAM