Yes, there are sliders in the UI for that. V1.3 documentation (current free version):
https://everlastervr.github.io/docs/naturalis/v1_3/
It's a plugin both for users and creators (most plugins are). The plugin is added to a person atom and is specific to that atom. To use your preferred settings automatically, save a user defaults preset and it will be automatically loaded the next time you add the plugin.
Fixing nipples poking through clothes is achieved through applying a clothing profile. For details, see the documentation above