The .dsf file serves as the underlying structural blueprint for the shader. Unlike the general-purpose Iray Uber Shader which handles everything from metal to glass, the PBRSkin shader is purpose-built for human skin.
A standout technical feature defined within the PBRSkin architecture (referenced by this file) is the separation of the skin into two distinct layers for rendering calculations: /data/daz 3d/built-in content/daz iray pbrskin/pbrskin.dsf