Skydome visibility options are missing

[TipTop76]

With the skydome selected, normally there should be options like camera and sss and specular underneath the visibility group, why are they missing? So strange, I really need to access these options obviously.

Edit: I just tried deleting my maya preferences folder and the missing options have appeared! wtf?

Using Maya 2018 Arnold 2.0.1

[sebastien.blaineau.ortegaHRM3U]

but, in this snapshot the Visibility group is just closed, isn't it ?

[Stephen.Blair]

Oh right. AOV Light Group isn't in a section. Like User Options