hi,
just FYI, some of the specular channel properties give (sometimes completely) wrong ids when dragged to the console...
eg.
c4d.REFLECTION_LAYER_MAIN_VALUE_ROUGHNESSLINK
should be
c4d.REFLECTION_LAYER_MAIN_SHADER_ROUGHNESS
c4d.REFLECTION_LAYER_FRESNEL_VALUE_STRENGTHREAL
should be
c4d.REFLECTION_LAYER_FRESNEL_VALUE_STRENGTH
etc
best, index